Status-Q

Well, yesterday's post got a lot of responses! Thank you, everybody!

Some of them are visible in the comments and some were by email. But most of them were from drivers rather older than me who said that my formula would have them driving at 40 on motorways (or something like that).

Now, notice that I did talk about the maximum speed you like driving rather than the maximum speed you would consider driving, but clearly I have more high-velocity octogenarians amongst my readership than I had previously realised, for which I feel duly honoured.

Ian Clark suggested an amendment which was essentially

V_max = 103 - (age * 2 / 3)

which would still suit me and give older readers a few more mph to play with, but I think I'll need an exponential component to get anything reasonable, perhaps something more like:

V_max = 100 - 0.6 *age^0.95

Anyway, there was agreement from several readers that the desire to break the speed limit certainly decreases with age, and Andy Davy observed that toddling along at 50mph is often fine as long as you have an interesting podcast playing; an assertion I can definitely support. In my case, though, it's often an audiobook: we're currently touring France to the accompaniment of The Count of Monte Cristo. (I'm now contemplating my next theorem about the duration of any journey being inversely proportional to the quality of your listening material...)

All this reminds me of, in my younger days, getting stuck in completely stationary traffic on the M25 while heading for an airport to catch a flight. The minutes ticked by, my anxiety rose, and then I realised that the pumping drumbeat of my music probably wasn't helping. I replaced it with some nice Brahms cello sonatas, and, all of a sudden, my equanimity was restored, my blood pressure declined, and I gazed calmly at the surrounding vehicles (about which I could, in any case, do nothing). And yes, I arrived in plenty of time.

When we started towing a boat behind our car, and were consequently limited to 60mph rather than 70mph on major roads in the UK, I found I rather liked travelling that way. Yes, it took a bit longer, but it was more relaxing.

And I've noticed that, whether due to a growth in wisdom or to a decline in testosterone -- I prefer to think it's the former -- I now tend to drive rather more slowly than I did a decade or two ago. Rose suggests I may just be subconsciously aware of slower reaction times...

But this has led me to propose Quentin's Law of Optimal Velocity, which is the maximum speed in miles per hour at which you like to drive, and is given by:

Vmax = 120 - age

but I freely admit that this is based on a rather small sample size (errm... one, to be precise) so would be grateful for more data.

Does it correspond to your own experience?