Also, "full lane" doesn't always mean 10' minimum. I've seen supposedly full traffic lanes marked with offical painted lines and routinely used by car traffic that when a heavy cargo truck tries to use them the tires on each side are riding on the lines and I've measured them with a tape measure and found them to only be 8' (slightly less or more). So far 7', 1-3/4", measured inside edge of painted line to inside edge of painted line, is the narrowest main lane I've actually seen and stopped, pulled over, and waited for a break in traffic to measure with my little tape measure I keep in my bike bag to confirm it actually was as narrow as I thought it was.