The Metropolitan Police Service run fairly frequent sessions on Wellington Street in Covent Garden (that's the street just north of Waterloo Bridge outside the Lion King theatre) to give cyclists a driver's-eye view from the cab of an HGV. I've always been deeply cynical about these exercises, regarding them as little more than a sophisticated way of blaming the victim (i.e. cyclists) for accidents that have yet to happen.
It turns out that, although not entirely wrong, there were some fairly big gaps in my knowledge and I'm very pleased that the MPS took the time to explain. Let me elaborate.
The cab of the police HGV they were using was quite new and it had all the required mirrors - six, in total - creating an apparently comprehensive image of the surrounding road. The demo is done by two guys, one with a bike, one in the cab. The guy with the bike walks it around the outside of the cab and guy in the passenger seat explains what the driver can and can't see; it's a great demo.
As soon as they finish it's obvious that it's very easy for a cyclist to find a blind spot. Worse, it's possible for both cyclist and driver to follow all the rules, take care about their positioning, check their mirrors, look around them, signal clearly and still collide because one simply can't see the other in his completely legal and correct position on the road. Legal, in this instance, doesn't coincide with safe.
There are (at least) two problems. First, even with six mirrors the driver can't see enough of the space around the cab to be sure it's safe to move off. Second, it takes about 330 milliseconds (
see page 8) for a driver to scan each mirror so reviewing six and the road in front provides plenty of time for cyclists to move into the already scanned area.
Mirrors clearly aren't the answer so what options are left? Cameras could be used to eliminate blind spots but this just worsens the mirror-scanning problem. Transparent doors or lowered cabs might improve visibility but aren't easily retro-fitted into the existing fleet; changing legislation to force these improvements could take years. Banning HGVs entirely would probably encourage a proliferation of smaller delivery vehicles, exchanging one body of professional drivers for ten times as many half-trained amateurs (not to mention increasing pollution and congestion); not ideal.
We could try to solve the problem by educating cyclists and asking them to avoid HGVs but even with the best efforts of the police (and the demo really was very good) they're never going to reach a significant proportion of the cycling population.
From what I can see there is only one real solution; we must stop forcing bikes and lorries to share the same road. They must be segregated, either by time (HGVs in the city centre between 23:00 and 05:00, maybe?) or by space. Time might be easier to implement but isn't a total solution and it would create an organisational nightmare for hauliers and their customers; it's probably a non-starter.
And that leaves us with segregating the roads to physically separate bikes and other road users. This isn't a short-term option so it doesn't help with today's problem but, long-term, it's by far the best option. In reality, though, we're probably going to need to improve drivers' visibility, change the way HGVs use the roads, reduce the size and number of goods vehicles in our city centres and make various other changes if we're to make significant improvements to road safety.
While we wait for things to improve, I'm going to change the way I ride around large vehicles. More specifically, I will be keeping away from HGVs on the assumption that, no matter where I am on the road, the driver won't be able to see me. Like wearing helmets and hi-vis jackets, this shouldn't be necessary but I think riding defensively is, at least for now, vital.
And if you get the chance to sit in the Met's HGV cab you should take it and reset your thinking on HGVs and their drivers.