From How We Drive by Tom Vanderbilt
In the by turns tragic and outrageous case of Raquel Nelson, I keep seeing a call for “marked crosswalks” to be installed on Austell Road, near the bus stop where pedestrians naturally want to cross (rather than walk the estimated 2/3 of a mile to the stop).
But I’m unclear what they’re calling for — is it a traffic signal with a marked crosswalk?
Or just a marked crosswalk? Which we intuitively think would be better than nothing — or would it?
From what I’ve read on marked crosswalks, they precisely begin to lose effectiveness on roads with at least four lanes, and volumes of upwards of 30,000 vehicles per day. Not to mention a “posted” speed of 45 mph.
To quote the FHWA:
Thus, installing a marked crosswalk at an already undesirable crossing location (e.g., wide, high-volume street) may increase the chance of a pedestrian crash occurring at such a site if a few at-risk pedestrians are encouraged to cross where other adequate crossing facilities are not provided. This explanation might be evidenced by the many calls to traffic engineers from citizens who state, “Please install a marked crosswalk so that we can cross the dangerous street near our house.” Unfortunately, simply installing a marked crosswalk without other more substantial crossing facilities often does not result in the majority of motorists stopping and yielding to pedestrians, contrary to the expectations of many pedestrians.