Dondare wrote:
Wikipedia is not always right, but this artical seems to be well researched.
http://en.wikipedia.org/wiki/Segregated ... facilitiesI took 1 look at this
sketch (for some reason SS won't display this) and soon appreciated what you meant. However, as I suspected:
“
Accident analysis suggests that there is merit in providing segregated space for cyclists on arterial routes with few junctions to minimize the number of collisions.”
I can only assume these are where a higher proportion of fatalities and serious injuries occur.
The weighting for arterial and urban roads must be correctly accounted for to determine if there is an overall net benefit. Simply quoting “the accident rate on them is 12 times higher” is misleading as it clearly does not factor in the benefit from arterial cycle paths. Also, it is “
up to 12 times”, not “
is 12 times”. Furthermore, only the collisions are quantified; what about the overall injury and overall fatality rates? Surely casualty stats are what is important?
Let’s consider the urban cycle paths as it is only these that have a negative impact. The problem here, as you already highlighted, are at the junctions. It would seem that with incidents here are a result of inattention of drivers turning in/out of the junction. It is reasonable to conclude that the use of a cycle lane further hides the cyclist from a driver’s nominal view (especially the oncoming cyclists), resulting with an increased risk of SMIDSY. A driver won’t be exceeding the speed limit when turning in/out of a junction, so a camera placed here can’t have any positive benefit for cyclists crossing these junctions. In fact, the attention deficit is likely to be increased from the speedo gazing resulting from the placement of speed cameras for those driving straight on. Weigh this up against the less than 5% benefit of likelihood/severity (discussed previously) from camera use and you’ll begin to see the bigger picture that we see.
Speed cameras may be of small benefit if there are no/few junctions, but clearly there is greater benefit using a cycle path.
I take your point and agree that cycle paths crossing over frequent junctions could be a significant determent to the safety of cyclists, but placement of a speed camera instead certainly won’t help either. How about you post something in the brainstorming section regarding better cycle path design?
Dondare wrote:
I prefer roads without them, research has shown that motorists give cyclists less clearance when overtaking if there's a white line painted on the road between them. (Actually that's something you'd understand here: give a motorist a target and he'll aim for the target; don't give him a target and he'll use his own judgement
As usual, things are not quite as black and white as they seem.
Consider the car following behind another. That driver will see the lead car move right but due to the geometry he won’t be able to see why so perhaps assumes the driver is turning right (especially if the lead driver is slowing down, if only to pass the cyclist at a safer speed). The following driver will be tempted to position themselves for a pass, a painted cycle lane will discourage this dangerous displacement to the left. No cycle lane and the cyclist ahead is in real danger of being shunted.