Low Clearance can be a real challenge
http://11foot8.com/
when driving a commercial truck (18 wheeler), the sign to look for is 13'6" and above. anything below that, and you've got problems.
in new york city, there are a seemingly endless number of low clearance points, particularly on the parkways. the story is that the guy who designed the highway system there,
robert moses, wanted to keep black people off of the beaches and out of white areas by making it remarkably difficult to get there by bus.
