[net.auto] bikes and cars

neal@druxv.UUCP (09/23/83)

For you people in net.auto; over here in net.bicycle we've been
discussing bike/car interactions.  I thought it would be good to extend
the discussion to you also.  (Anne, you might want to re-post your article
over there, though you'll probably be shot if you do....)

Anne made many good points.  I'd like to emphasize the admonition
not to honk your horn when you are right behind a bike.  It certainly does
scare the shit out of the bike rider, and conveys exactly the wrong
message.  The biker already knows you're there, since cars are so loud
(even when the biker has a helmet on - believe me!).  The problem is that
for a split second the biker's reflex is to interpret the horn as a signal
of immanent danger, causing him/her to behave unpredictably.
In fact, the horn simply demonstrates that the driver has seen the biker
(and as has been pointed out, the major cause of accidents is drivers
not seeing bikers), so the danger factor was actually low.

I'm not sure under what circumstances Dave was worried about bikers
riding in the middle of the lane.  I rarely see bikers in the middle
of the lane going uphill.  The canyons he is talking about
are steep enough that bicycles can frequently hit the speed limit downhill
(45, if I'm not mistaken).  Even if they aren't moving that fast,
on a twisting road it is much safer for them to take up the whole lane
so that
	1) they have manuvering room
	2) cars can SEE them (especially around the frequent corners.)
Naturally, if the bike starts to impede traffic, the rider should find
a safe stretch to slow down and allow cars to pass.
When I'm planning a bike ride I try to go DOWN the heavily-travelled
routes and UP the light-duty ones because that way I'll spend less
time in traffic, and I'll be moving at a speed more closely
matched to the cars, so there's more time for decisions to be made
during interactions.

Neal McBurnett, AT&T Information Systems Laboratories, Denver.
ihnp4!druxv!neal