The San Francisco Streetsblog recently posted about a new ‘system’ to keep cyclists out of the door zone which has been introduced by the
San Francisco Municipal Transportation Agency on a trial basis. The idea is to add a T next to parking spaces. This is meant to show the area of the door zone but to me it is rather confusing.
a 'T' on Howard Street
Is this really a good way to avoid the door zone? From what I have seen the vertical line of the T is painted out from the boundary line of the parking spaces, so if you cycle outside of the T then you should be just outside of the door zone.
How it could be better, but it still doesn't make sense
American states have tried several different ways to get work around the door zone. Most of them involving a form of sharrows but many of them don’t have borders so cyclists don’t stay out of the door zone.
Cyclists, like many road users, will stay in the lane markings provided, even if that means putting them in danger. If the lane markings provided adequate space next to parked cars then KSI’s from doorings should be decreased. For example, the image below shows how there is a buffer between the cycle lane and parked cars and there is a boundary line on both sides of the cycle lane. This should keep most cyclists safe from the door zone as they follow the cycle lane away from the danger.
Chesterton Road, Cambridge
The T to me is another road marking which is confusing and is not self explanatory. The door zone is not known by many cyclists and if the road marking that is meant to save lives is not self explanatory as to what the danger is, then it doesn’t work.