The UK and the US both round down to lower whole decimeter, but express it as meters with a tenth digit, ie 2.2 m. Actually, the UK rounds down, then subtracts another 0.1 m so your example would be 2.1 m in the UK, 2.2 m in the US. I think Canada would be the same as US but i've never found the printed rule. For the US, the MUTCD would not regulate marking in a private parking garage so you might find a "bad" conversion from feet and inches.
--- On Wed, 2/1/12, Paul Rittman <[email protected]> wrote: From: Paul Rittman <[email protected]> Subject: [USMA:51432] Standard unit for driving clearance To: "U.S. Metric Association" <[email protected]> Date: Wednesday, February 1, 2012, 1:27 PM Occasionally I read of people complaining that they saw a sign that said that the clearance for a bridge was 2257mm or something like that. I realize that if you gave the figure in meters, you'd need to use the decimal for measuring the clearance of a bridge, or the lower level of a parking garage, etc. Is there a standard unit that is given for occasions like this?
