references for signal timing and signage
For the US, you can download a free copy of the Signal Timing Manual, DOI 10.17226/22097 which presumably will change at some point because of this case. Another generally interesting guide is the Manual of Uniform Traffic Control Devices which details the US standard signs and road markings and their permitted usage and placement. Some US states have state specific additions to this, but they're generally small. If you're arguing with city government about the idiotic placement of a sign it generally works pretty well to be able to quote the MUTCD section it.
Biting the hand that feeds IT
