The Facebook Cyclists are Drivers group carries a report of a cyclist who was rear-ended by a motorist who was blinded by the setting sun. And, here’s an urban planning issue I bet that you haven’t heard about (unless you have read my Facebook comment on that report). The solution to this problem is, well, blindingly clear, but also, completely overlooked.
Why do street grids have to go north-south and east-west, guaranteeing that the east-west streets will have blinding sun for a week or two, twice a year, early morning and evening peak commute time, and that the south side of those streets will only get sun in the late spring and early summer, early and late in the day?
If the street grids go northeast-southwest and southwest-northeast, then both sides of every street get sunlight every day of the year, and are more conducive to snow melting and plantings thriving. There is never blinding sun along any street (though there can be when turning at intersections — this issue, to be sure, deserves further study).
This approach works except at far northern and southern latitudes, where the sun rises and sets far north or south of the east-west line in midsummer and midwinter.
One city which in fact has a northeast-southwest and northwest-southeast street grid is Montreal, because the long axis of the Montreal island runs northeast-southwest. That’s one more reason, though not the main one, to discredit the Lusk et al. study of Montreal bikeways
In the USA, the east-west-north-south blinding glare problem was given a major boost by the Homestead Act of 1862, which laid out most of the Midwest and Great Plans, both urban and rural, as far west as the Rocky mountains, in north-south-east-west grids.
The late Prof. John Finley Scott, a staunch advocate of integrated cycling, proposed “wrecking ball therapy” as a way to cure the problems with aging urban infrastructure, and perhaps this is an improvement to keep in mind in that context.