Methodology for entering

[yakra]

Welcome to TravelMapping, M3200!

The only disappointment I've had is that some mileage doesn't count: there are portions of state highways in California that, while they still have posted route shields, are no longer part of the "official roadway" and are excluded from the mileage computations.  Such is life. 

The California State Highways are still a preview system, a work in progress.
I haven't been following that system's topic super close, but one of the perennial sticking points seems to be how to handle segments that CalTrans relinquishes to local jurisdictions, cities etc. Oscar discusses some of what he's done where, and his rationale for doing so.