n76
(N76)
25
I am not aware of a tool or plug in that helps on tagging traffic lights. On one way highways it is easy, just put a node where the stop point is and then add a
highway=traffic_signal
tag. On two way highways you also need to add a
traffic_signal:direction=forward|backward
tag where forward/backward is the direction the traffic signal affects flow with respect to the direction the way was draw.
Stop signs are similar but, unfortunately the direction tagging does not use something like stop:direction but rather
direction=forward|backward
. The direction tag also has a totally unrelated semantic for other types of objects like mine entrances, etc. where the direction is either in degrees or north/south/east/west. I made mention about that use of one tag name with multiple contradictory uses on a tagging mail list and did not make much headway in getting people to acknowledge the problem much less consensus on what to do about it.
I’ve not done much lane width tagging and haven’t looked for a plug in to help.
My personal rule of thumb is that if there is no painted center line the road is unclassified, residential or service. If the authorities decided it is enough of a feeder to paint a center line then it is probably at least a tertiary. For suburban/urban roads, if it is mostly divided then it is probably at least secondary.
Urban primary to me is harder to define, at least now that I am in Orange County. In the Bay Area it seemed to be pretty clear: They were the main roads one would take that did not quite make the cut to be counted as a Santa Clara County expressway. However in Orange County there are a fair number of roads that people don’t seem to consider as major yet they are divided, often with three or more lanes in each direction, with speed limits of up to 55 MPH and relatively few traffic lights. In Santa Clara County they’d almost be expressways but here they people seem to feel they are of secondary importance. I often punt on these, leaving the classification as I found it and take solace in knowing that if the speed limits and traffic control (lights, signs, etc.) are properly tagged then navigation apps will find the best route regardless of the tagged classification being secondary or tertiary instead of primary.