Dan Q

Tag: driving

Heterophonic Homonyms

The elder of our two cars is starting to exhibit a few minor, but annoying, technical faults. Like: sometimes the Bluetooth connection to your phone will break and instead of music, you just get a non-stop high-pitched screaming sound which you can suppress by turning off the entertainment system… but can’t fix without completely rebooting the entire car.

A car dashboard with five amber and one red warning lights lit.
There’ve been other “this car is getting a bit older” technical faults too. One of his tyre pressure sensors broke the other month and caused a cascade of unrelated errors that disabled the traction control, ABS, auto-handbrake, parking sensors, and reversing camera… but replacing the pressure sensor fixed everything. Cars are weird, and that’s coming from somebody working in an industry that fully embraces knock-on regression bugs as a fact of life.

The “wouldn’t you rather listen to screaming” problem occurred this morning. At the time, I was driving the kids to an activity camp, and because they’d been quite enjoying singing along to a bangin’ playlist I’d set up, they pivoted into their next-most-favourite car journey activity of trying to snipe at one another1. So I needed a distraction. I asked:

We’ve talked about homonyms and homophones before, haven’t we? I wonder: can anybody think of a pair of words that are homonyms that are not homophones? So: two words that are spelled the same, but mean different things and sound different when you say them?

This was sufficiently distracting that it not only kept the kids from fighting for the entire remainder of the journey, but it also distracted me enough that I missed the penultimate turning of our journey and had to double-back2

…in English

With a little prompting and hints, each of the kids came up with one pair each, both of which exploit the pronunciation ambiguity of English’s “ea” phoneme:

  1. Lead, as in:
    • /lɛd/ The pipes are made of lead.
    • /liːd/ Take the dog by her lead.
  2. Read, as in:
    • /ɹɛd/ I read a great book last month.
    • /ɹiːd/ I will read it after you finish.

These are heterophonic homonyms: words that sound different and mean different things, but are spelled the same way. The kids and I only came up with the two on our car journey, but I found many more later in the day. Especially, as you might see from the phonetic patterns in this list, once I started thinking about which other sounds are ambiguous when written:

  1. Tear (/tɛr/ | /tɪr/): she tears off some paper to wipe her tears away.
  2. Wind (/waɪnd/ | /wɪnd/): don’t forget to wind your watch before you wind your horn.
  3. Live (/laɪv/ | /lɪv/): I’d like to see that band live if only I could live near where they play.
  4. Bass (/beɪs/ | /bæs/): I play my bass for the bass in the lake.
  5. Bow (/baʊ/ | /boʊ/): take a bow before you notch an arrow into your bow.
  6. Sow (/saʊ/ | /soʊ/): the pig and sow ate the seeds as fast as I could sow them.
  7. Does (/dʌz/ | /doʊz/): does she know about the bucks and does in the forest?

(If you’ve got more of these, I’d love to hear read them!)

…in other Languages?

I’m interested in whether heterophonic homonyms are common in any other languages than English? English has a profound advantage for this kind of wordplay3, because it has weakly phonetics (its orthography is irregular: things aren’t often spelled like they’re said) and because it has diverse linguistic roots (bits of Latin, bits of Greek, some Romance languages, some Germanic languages, and a smattering of Celtic and Nordic languages).

With a little exploration I was able to find only two examples in other languages, but I’d love to find more if you know of any. Here are the two I know of already:

  1. In French I found couvent, which works only thanks to a very old-fashioned word:
    • /ku.vɑ̃/ means convent, as in – where you keep your nuns, and
    • /ku.və/ means sit on, but specifically in the manner that a bird does on its egg, although apparently this usage is considered archaic and the word couver is now preferred.
  2. In Portugese I cound pelo, which works only because modern dialects of Portugese have simplified or removed the diacritics that used to differentiate the spellings of some words:
    • /ˈpe.lu/ means hair, like that which grows on your head, and
    • /ˈpɛ.lu/ means to peel, as you would with an orange.

If you speak more or different languages than me and can find others for me to add to my collection of words that are spelled the same but that are pronounced differently, I’d love to hear them.

Special Bonus Internet Points for anybody who can find such a word that can reasonably be translated into another language as a word which also exhibits the same phenomenon. A pun that can only be fully understood and enjoyed by bilingual speakers would be an especially exciting thing to behold!

Footnotes

1 I guess close siblings are just gonna go through phases where they fight a lot, right? But if you’d like to reassure me that for most it’s just a phase and it’ll pass, that’d be nice.

2 In my defence, I was navigating from memory because my satnav was on my phone and it was still trying to talk over Bluetooth to the car… which was turning all of its directions into a high-pitched scream.

3 If by “advantage” you mean “is incredibly difficult for non-native speakers to ever learn fluently”.

×

Article posted at UTC on .

25 comments

Note #26625

Off to Pembrokeshire on holiday I’ve had to stop near Cardiff to put some more charge into the car… which provides the perfect opportunity for the doggo and I to explore a nearby sports field and take in All. The. Smells. 🐶

Standing in a green park space, Dan gestures to his dog, a Frenchie, who's sniffing a nearby tree.

×

Sorry for any inconvenience

Rarely seen nowadays, these UK road signs were eventually declared “too impolite” and “brusque” and have now almost entirely been replaced with the ones that Brits are familiar with today, which read “Terribly sorry for the inconvenience, I hope it’s no bother, it’s all our fault really, so sorry, really sorry, sorry, I’ll put the kettle on shall I?”

On a grassy roadside verge, next to a temporary wire fence, a yellow-and-black metal sign reads 'Sorry for any inconvenience'.

×

Irish Signs

I’ve only been driving in Ireland for several days, so less than 100% of the iconography of the signage makes sense to me instantly, for now. But this one’s a complete mystery to me.

Photograph showing a road sign; it's yellow, diamond-shaped, and depicts in black the silhouette of a person running from left to right. Above them is the silhouette of a car, much smaller than them and twisted anticlockwise by about 20 degrees. Impact/movement marks eminate from the lower of the car's wheels, as if it's a thrown object that's just bounced off the head of the runner.

Is this warning joggers than tiny cars might bounce off their heads? Or is it exhorting distant swerving motorists to put on their right indicator to tell people which way to run to avoid being hit by them? Or maybe it’s advising that down this road is a football pitch for giants and they’ll play “headers” with you in your car if you’re not careful? I honestly haven’t a clue.

×

Special Roads

Duration

Podcast Version

This post is also available as a podcast. Listen here, download for later, or subscribe wherever you consume podcasts.

Sometimes I’ve seen signs on dual carriageways and motorways that seem to specify a speed limit that’s the same as the national speed limit (i.e. 60 or 70 mph for most vehicles, depending on the type of road), which seem a bit… pointless? Today I learned why they’re there, and figured I’d share with you!

Google Street View photo from the A1 East of Edinburgh, showing a blue "No motor cycles under 50cc, moped,s invalid carriages and animals" sign alongside a 70mph sign.
The first time I saw this sign, on the A1 near Edinburgh, I wondered why it wasn’t just a national speed limit/derestriction sign. Now I know.

To get there, we need a history lesson.

As early as the 1930s, it was becoming clear that Britain might one day need a network of high-speed, motor-vehicle-only roads: motorways. The first experimental part of this network would be the Preston By-pass1.

Monochome photograph showing construction of bridge support pillars.
Construction halted on several occasions owing to heavy rain, and only six weeks after opening the road needed to be closed for resurfacing after the discovery that water had penetrated the material.

Construction wouldn’t actually begin until the 1950s, and it wasn’t just the Second World War that got in the way: there was a legislative challenge too.

When the Preston By-pass was first conceived, there was no legal recognition for roads that restricted the types of traffic that were permitted to drive on them. If a public highway were built, it would have to allow pedestrians, cyclists, and equestrians, which would doubtless undermine the point of the exercise! Before it could be built, the government needed to pass the Special Roads Act 1949, which enabled the designation of public roads as “special roads”, to which entry could be limited to certain classes of vehicles2.

Monochrome photograph showing a sign at the entrance to the Preston By-pass, reading: 'Motorway. NO L-drivers, mopeds, motorcycles under 50cc., invalid-carriages, pedal-cycles, pedestrians, animals'.
The original motorways had to spell out the regulations at their junctions.

If you don’t check your sources carefully when you research the history of special roads, you might be taken in by articles that state that special roads are “now known as motorways”, which isn’t quite true. All motorways are special roads, by definition, but not all special roads are motorways.

There’s maybe a dozen or more non-motorway special roads, based on research by Pathetic Motorways (whose site was amazingly informative on this entire subject). They tend to be used in places where something is like a motorway, but can’t quite be a motorway. In Manchester, a couple of the A57(M)’s sliproads have pedestrian crossings and so have to be designated special roads rather than motorways, for example3.

1968 Manchester City Council planning document showing their proposed new special roads.
“…is hereby varied by adding Class IX of the Classes of Traffic set out in Schedule 4 to the Highways Act 1980 as a class of traffic permitted to use those lengths of the special roads described in the Schedule to this Scheme and which…” /snoring sounds intensify/

Now we know what special roads are, that we might find them all over the place, and that they can superficially look like motorways, let’s talk about speed limits.

The Road Traffic Act 1934 introduced the concept of a 30mph “national speed limit” in built-up areas, which is still in force today. But outside of urban areas there was no speed limit. Perhaps there didn’t need to be, while cars were still relatively slow, but automobiles became increasingly powerful. The fastest speed ever legally achieved on a British motorway came in 1964 during a test by AC Cars, when driver Jack Sears reached 185mph.

Cyclists alongside a 'motorway' river bridge lane.
The “M48” Severn Bridge is another example of a special road that appears to be part of a motorway. The cycle lane and footpath (which is not separated from the main carriageway by more than a fence) is the giveaway that it’s not truly a “motorway” but a general-case special road.

In the late 1960s an experiment was run in setting a speed limit on motorways of 70mph. Then the experiment was extended. Then the regulation was made permanent.

There’ve been changes since then, e.g. to prohibit HGVs from going faster than 60mph, but fundamentally this is where Britain’s national speed limit on motorways comes from.

The Motorways Traffic (Speed Limit) (England) Regulations 1967, highlighting "3. No person shall drive a motor vehicle on a motorway at a speed greater than 70 miles per hour".
I assume that it relates to the devolution of transport policy or to the separation of legislation that it replaces, but separate-but-fundamentally-identical acts were passed for Scotland and Northern Ireland.

You’ve probably spotted the quirk already. When “special roads” were created, they didn’t have a speed limit. Some “special roads” were categorised as “motorways”, and “motorways” later had a speed limit imposed. But there are still a few non-motorway “special roads”!

Putting a national speed limit sign on a special road would be meaningless, because these roads have no centrally-legislated speed limit. So they need a speed limit sign, even if that sign, confusingly, might specify a speed limit that matches what you’d have expected on such a road4. That’s the (usual) reason why you sometimes see these surprising signs.

As to why this kind of road are much more-common in Scotland and Wales than they are anywhere else in the UK: that’s a much deeper-dive that I’ll leave as an exercise for the reader.

Footnotes

1 The Preston By-pass lives on, broadly speaking, as the M6 junctions 29 through 32.

2 There’s little to stop a local authority using the powers of the Special Roads Act and its successors to declare a special road accessible to some strange and exotic permutation of vehicle classes if they really wanted: e.g. a road could be designated for cyclists and horses but forbidden to motor vehicles and pedestrians, for example! (I’m moderately confident this has never happened.)

3 There’s a statutory instrument that makes those Mancunian sliproads possible, if you’re having trouble getting to sleep on a night and need some incredibly dry reading.

4 An interesting side-effect of these roads might be that speed restrictions based on the class of your vehicle and the type of road, e.g. 60mph for lorries on motorways, might not be enforceable on special roads. If you wanna try driving your lorry at 70mph on a motorway-like special road with “70” signs, though, you should do your own research first; don’t rely on some idiot from the Internet. I Am Not A Lawyer etc. etc.

× × × × × ×

Article posted at UTC on .

1 comment

The Road (Segment) Less Travelled

Map showing approximate location of Dan's house, on a set of rural roads that connect to the A40 in two different places, with the segment between the two relevant junctions marked.

There are two junctions at which I can join the A40 trunk road from my house. When I drive East, I use the Easternmost of the two; when I drive West, I use the Westernmost; but I almost never drive the stretch of road between them!

A few years ago I generated heatmaps of my movements based on my long-running personal location log and, indeed, it shows a “cool spot” along this section of road too:

Heatmap showing a "cool spot" on the road (segment) less-travelled.

It’s inevitable I suppose that there should exist a “road (segment) less-travelled” right on my doorstep, but it still feels strange. Like when you live near a tourist attraction that you never get around to visiting. Except instead of a tourist attraction, I live near a major highway I rarely use.

Maybe I’m missing out on something great. Probably the commuters who use that road to get into and out of Oxford don’t think so.

× ×

Note posted at UTC on .

3 comments

Dan Q temporarily disabled GC9EXXX Church Micro 14129…Sutton

This checkin to GC9EXXX Church Micro 14129...Sutton reflects a geocaching.com log entry. See more of Dan's cache logs.

Cache removed and temporarily disabled. The council have just started installing new signage to advise of a new 20mph speed limit around here. 🎉

When they recently did the same in a nearby village, they removed a cache of this type as a (presumably accidental) side effect. I don’t know if this cache’s host is among those that’ll be affected but I suspect it will so I’ve temporarily removed this one as a precaution and I’ll reinstate it after the works are complete.

A 20mph "repeater" speed limit sign around the corner from the cache location.

×

[Bloganuary] Road Trip!

This post1 is part of my attempt at Bloganuary 2024.2Today’s prompt is:

Think back on your most memorable road trip.

Runners-up

It didn’t take me long to choose a most-memorable road trip, but first: here’s a trio of runners-up that I considered3:

  1. A midwinter ascent
    On the last day of 2018, Ruth‘s brother Robin and I made a winter ascent of Ben Nevis, the highest mountain in the British Isles. But amazing as the experience was, it perhaps wasn’t as memorable as the endless car journey up there, especially for Robin who was sandwiched between our two children in the back of the car and spent the entire 12-hour journey listening to Little Baby Bum songs on loop.4 Surely a quick route to insanity.
Dan and Robin atop Ben Nevis
Probably should have wiped the snow off the lens.
  1. A childhood move
    Shortly after starting primary school my family and I moved from Aberdeen, Scotland to the North-West of England. At my young age, long car journeys – such as those we’d had to make to view prospective new houses – always seemed interminably boring, but this one was unusually full of excitement and anticipation. The car was filled to the brim with everything we needed most-imminently to start our new lives5, while the removals lorry followed a full day behind us with everything less-essential6. I’m sure that to my parents it was incredibly stressful, but for me it was the beginning of an amazing voyage into the unknown.
A partially-pebbledashed house, number 7, with an old white Ford Escort parked in the driveway.
To this house. In this car.
  1. Live on Earth
    Back in 1999 I bought tickets for myself and two friends for Craig Charles’ appearance in Aberystwyth as part of his Live on Earth tour. My two friends shared a birthday at around the date of the show and had expressed an interest in visiting me, so this seemed like a perfect opportunity. Unfortunately I hadn’t realised that at that very moment one of them was preparing to have their birthday party… 240 miles away in London. In the end all three of us (plus a fourth friend who volunteered to be and overnight/early morning post-nightclub driver) attended both events back to back! A particular highlight came at around 4am we returned from a London nightclub to the suburb where we’d left the car to discover it was boxed in by some inconsiderate parking: we were stuck! So we gathered some strong-looking fellow partygoers… and carried the culprit’s car out of the way7. By that point we decided to go one step further and get back at its owner by moving their car around the corner from where they’d parked it. I reflected on parts of this anecdote back in 2010.

The winner

At somewhere between 500 and 600 road miles each way, perhaps the single longest road journey I’ve ever made without an overnight break was to attend a wedding.

A white couple, bride and groom; she's wearing a white dress and flowers in her hair; he's in a suit with a grey waistcoat and a thistle buttonhole.
The wedding of this lovely couple, whose courtship I expressed joy over the previous year.

The wedding was of my friends Kit and Fi, and took place a long, long way up into Scotland. At the time I (and a few other wedding guests) lived on the West coast of Wales. The journey options between the two might be characterised as follows:

  • the fastest option: a train, followed by a ludicrously expensive plane, followed by a taxi
  • the public transport option: about 16 hours of travel via a variety of circuitous train routes, but at least you get to sleep some of the way
  • drive along a hundred miles of picturesque narrow roads, then three hundred of boring motorways, then another hundred and fifty of picturesque narrow roads

Guess which approach this idiot went for?

Despite having just graduated, I was still living very-much on a student-grade budget. I wasn’t confident that we could afford both the travel to and from the wedding and more than a single night’s accommodation at the other end.

But there were four of us who wanted to attend: me, my partner Claire, and our friends Bryn and Paul. Two of the four were qualified to drive and could be insured on Claire’s car8. This provided an opportunity: we’d make the entire 11-or-so-hour journey by car, with a pair of people sleeping in the back while the other pair drove or navigated!

It was long, and it was arduous, but we chatted and we sang and we saw a frankly ludicrous amount of the A9 trunk road and we made it to and from what was a wonderful wedding on our shoestring budget. It’s almost a shame that the party was so good that the memories of the road trip itself pale, or else this might be a better anecdote! But altogether, entirely a worthwhile, if crazy, exercise.

Footnotes

1 Participating in Bloganuary has now put me into my fifth-longest “daily streak” of blog posts! C-c-c-combo continues!

2 Also, wow: thanks to staying up late with my friend John drinking and mucking about with the baby grand piano in the lobby of the hotel we’re staying at, I might be first to publish a post for today’s Bloganuary!

3 Strangely, all three of the four journeys I’ve considered seem to involve Scotland. Which I suppose shouldn’t be too much of a surprise, given its distance from many of the other places I’ve lived and of course its size (and sometimes-sparse road network).

4 Okay, probably not for the entire journey, but I’m certain it must’ve felt like it.

5 Our cargo included several cats who almost-immediately escaped from their cardboard enclosures and vomited throughout the vehicle.

6 This included, for example, our beds: we spent our first night in our new house camped together in sleeping bags on the floor of what would later become my bedroom, which only added to the sense of adventure in the whole enterprise.

7 It was, fortunately, only a light vehicle, plus our designated driver was at this point so pumped-up on energy drinks he might have been able to lift it by himself!

8 It wasn’t a big car, and in hindsight cramming four people into it for such a long journey might not have been the most-comfortable choice!

× × ×

Article posted at UTC on .

No comments

Normal for Children

Lacking a basis for comparison, children accept their particular upbringing as normal and representative.

Close-up showing tentacles of a sundew plant.
“Feed me, Seymour!”

Kit was telling me about how his daughter considers it absolutely normal to live in a house full of insectivorous plants1, and it got me thinking about our kids, and then about myself:

I remember once overhearing our eldest, then at nursery, talking to her friend. Our kid had mentioned doing something with her “mummy, daddy, and Uncle Dan” and was incredulous that her friend didn’t have an Uncle Dan that they lived with! Isn’t having three parents… just what a family looks like?

Dan, wearing a black jumper, sits on a green chair in a brightly-decorated bedroom. On his chest, a 2-year-old girl has fallen asleep, clutching a woolen yellow blanket and with her thumb in her mouth.
You don’t have an Uncle Dan? Then where do you nap‽

By the time she was at primary school, she’d learned that her family wasn’t the same shape as most other families, and she could code-switch with incredible ease. While picking her up from school, I overheard her talking to a friend about a fair that was coming to town. She told the friend that she’d “ask her dad if she could go”, then turned to me and said “Uncle Dan: can we go to the fair?”; when I replied in the affirmitive, she turned back and said “my dad says it’s okay”. By the age of 5 she was perfectly capable of translating on-the-fly2 in order to simultaneously carry out intelligble conversations with her family and with her friends. Magical.

When I started driving, and in particular my first few times on multi-lane carriageways, something felt “off” and it took me a little while to work out what it was. It turns out that I’d internalised a particular part of the motorway journey experience from years of riding in cars driven by my father, who was an unrepentant3 and perpetual breaker of speed limits.4 I’d come to associate motorway driving with overtaking others, but almost never being overtaken, but that wasn’t what I saw when I drove for myself.5 It took a little thinking before I realised the cause of this false picture of “what driving looks like”.

A boxy 1979 white Ford car, number plate DSS 657T with a badly dented and somewhat corroded front wheel arch on the drivers' side, sits empty and parked at the side of an otherwise empty asphalt strreet. In the background, under grey skies, a city skyline can be made out with houses, tower blocks, and a church steeple, on the other side of an arched river bridge. The leaves are early-autumn coloured: mostly greem, but with some brown appearing and a handful of bare branches exposed.
How my dad ever managed to speed in this old rustbucket I’ll never know.

The thing is: you only ever notice the “this is normal” definitions that you’ve internalised… when they’re challenged!

It follows that there are things you learned from the quirks of your upbringing that you still think of as normal. There might even be things you’ll never un-learn. And you’ll never know how many false-normals you still carry around with you, or whether you’ve ever found them all, exept to say that you probably haven’t yet.

A small child, sitting on the floor, uses a mobile phone to watch a cartoon of two people struggling to pull a fishing rod. A feminine hand with brown-painted nails and rings on two fingers reaches in to offer the child a minature model of a human brain.
I wanted a stock image that expressed the concept of how children conceptualise ideas in their mind, but I ended up with this picture of a women offering her kid a tiny human brain in exchange for her mobile phone back. That’s a normal thing that all families do, right?

It’s amazing and weird to think that there might be objective truths you’re perpetually unable to see as a restult of how, or where, or by whom you were brought up, or by what your school or community was like, or by the things you’ve witnessed or experienced over your life. I guess that all we can all do is keep questioning everything, and work to help the next generation see what’s unusual and uncommon in their own lives.

Footnotes

1 It’s a whole thing. If you know Kit, you’re probably completely unsurprised, but spare a thought for the poor randoms who sometimes turn up and read my blog.

2 Fully billingual children who typically speak a different language at home than they do at school do this too, and it’s even-more amazing to watch.

3 I can’t recall whether his license was confiscated on two or three separate ocassions, in the end, but it was definitely more than one. Having a six month period where you and your siblings have to help collect the weekly shop from the supermarket by loading up your bikes with shopping bags is a totally normal part of everybody’s upbringing, isn’t it?

4 Virtually all of my experience as a car passenger other than with my dad was in Wales, where narrow windy roads mean that once you get stuck behind something, that’s how you’re going to be spending your day.

5 Unlike my father, I virtually never break the speed limit, to such an extent that when I got a speeding ticket the other year (I’d gone from a 70 into a 50 zone and re-set the speed limiter accordingly, but didn’t bother to apply the brakes and just coasted down to the new speed… when the police snapped their photo!), Ruth and JTA both independently reacted to the news with great skepticism.

× × × ×

Article posted at UTC on .

1 comment

Mathematics of Mid-Journey Refuelling

I love my electric car, but sometimes – like when I need to transport five people and a week’s worth of their luggage 250 miles and need to get there before the kids’ bedtime! – I still use our big ol’ diesel-burning beast. And it was while preparing for such a journey that I recently got to thinking about the mathematics of refuelling.

Car display showing "Please refuel. Range: 40ml"
I don’t know why you’d measure range in millilitres in the first place, but I’m hearing that I ought to fill up the car before we go.

It’s rarely worth travelling out-of-your-way to get the best fuel prices. But when you’re on a long road trip anyway and you’re likely to pass dozens of filling stations as a matter of course, you might as well think at least a little about pulling over at the cheapest.

You could use one of the many online services to help with this, of course… but assuming you didn’t do this and you’re already on the road, is there a better strategy than just trusting your gut and saying “that’s good value!” when you see a good price?

It turns out this is an application for the Secretary Problem (and probably a little more sensible than the last time I talked about it!).

A woman's hand reaches for one of four fuel pump nozzles. Photo by Gustavo Fring, used under the Pexels License.
If you can’t decide which nozzle is best, mix up a cocktail of them all. #TerribleProTip

Here’s how you do it:

  1. Estimate your outstanding range R: how much further can you go? Your car might be able to help you with this. Let’s say we’ve got 82 miles in the tank.
  2. Estimate the average distance between filling stations on your route, D. You can do this as-you-go by counting them over a fixed distance and continue from step #4 as you do so, and it’ll only really mess you up if there are very few. Maybe we’re on a big trunk road and there’s a filling station about every 5 miles.
  3. Divide R by D to get F: the number of filling stations you expect to pass before you completely run out of fuel. Round down, obviously, unless you’re happy to push your vehicle to the “next” one when it breaks down. In our example above, that gives us 16 filling stations we’ll probably see before we’re stranded.
  4. Divide F by e to get T (use e = 2.72 if you’re having to do this in your head). Round down again, for the same reason as before. This gives us T=5.
  5. Drive past the next T filling stations and remember the lowest price you see. Don’t stop for fuel at any of these.
  6. Keep driving, and stop at the first filling station where the fuel is the same price or cheaper than the cheapest you’ve seen so far.
Dan sitting in the driving seat of a car, doing maths on a portable whiteboard.
Obviously you should take care doing maths on the road. Don’t drink and derive!

This is a modified variant of the Secretary Problem because it’s possible for two filling stations to have the same price, and that’s reflected in the algorithm above by the allowance for stopping for fuel at the same price as the best you saw during your sampling phase. It’s probably preferable to purchase sub-optimally than to run completely dry, right?

Of course, you’re still never guaranteed a good solution with this approach, but it maximises your odds. Your own risk-assessment might rank “not breaking down” over pure mathematical efficiency, and that’s on you.

× × ×

Article posted at UTC on .

1 repost

GB number plate sticker no longer valid abroad

This is a repost promoting content originally published elsewhere. See more things Dan's reposted.

GB sticker being affixed to a car.

British motorists driving outside the UK must now remove old-style GB stickers or cover them up.

Instead they should display a UK sticker or have the UK identifier on their number plate.

The UK government guidance has been in place since Tuesday 28 September.

…

With the replacement of “GB” stickers with “UK” ones, I’ll soon be able to add another joke to my list of jokes that aged badly. I first read this in a joke book when I was a kid:

A young man gets his first car and his younger sister comes to look at it. “What’s this ‘L’ sticker for?” she asks.

“It stands for ‘Learning’,” replies man, “Because I’m still having driving lessons.”

Some time later, after he’s passed his test, the man is preparing to take a trip to France with his friends. His sister points to a sticker on his car. “Does this ‘GB’ mean you’re ‘Getting Better’?”

×

Repost posted at UTC on .

No comments

Dan Q found GC55HCZ Take a break!!

This checkin to GC55HCZ Take a break!! reflects a geocaching.com log entry. See more of Dan's cache logs.

The battery indicator on the eV I’m renting wasn’t confident that I’d make it all the way back home without a top-up, so I stopped for a 45 minute charge and a drink – the former for the car, the latter for me – at the services (pic attached of me at the chargers: this is nowhere near the GZ!) and figured I’d try to find the cache while I was waiting.

Coords took me to an unlikely looking spot and the hint wasn’t much use, so I looked at the logs and noticed that a few people had reported that they had found themselves on the “wrong side of the road”. That could be me, too, I thought… but the wrong way… in which direction? There were two roads alongside me.

I spotted a tall white thing that was different to the others and guessed that maybe that was what the hint referred to? When I got there, I even found a likely looking hiding place, but clearly my brain is still in USA-caching mode (I was caching on California a couple of weeks ago) because the hiding place I was looking at was the kind of “LPC” that just doesn’t happen over here. Damn.

So I stopped and tried to look nonchalant for a while, pacing around and looking for anything else that might fit the clue. Then I saw three things close together on the other-other side of the road and it immediately clicked that I was looking for something like them. I crossed over, sat down on the convenient perch while I waited for some muggles to pass, retrieved the cache and – at last – signed the log in what was basically the only remaining bit of space.

Had my GPSr sent me to the right place to begin with this adventure would have been much shorter, but I got there in the end… and still with 13 minutes of charging time left before I could drive away. TFTC!

Dan and an eV at a charging point

×