MoFro

Thanks for all your suggestions. I have the Rand McNally atlas which is useful, but I was thinking more along the lines of a POI database or a website with a list of locations so I could make my own. Failing that, if anyone knows of a narrow bridge location I would very much appreciate it if you could share. Regarding lowclearances.com, has anyone used their bridge height data?

I got that too. I asked them if it would be ready in time for my trip, but they said that it's several months away. Thought I'd see if anyone knew of another source.

I will soon be starting a six month tour of the US and Canada, and will be travelling in a Winnebago Sunstar which is quite big. While I will be on the major routes quite a lot, I also intend to take it off the beaten track. So I’m a little worried about bridges or underpasses with width and weight restrictions. I have a low clearance POI database, but can’t find anything for narrow bridges or bridges with weight limits. If anyone knows of any (in the US or Canada), I would be most grateful if you could post the coordinates here. Many thanks.