CPC464 Posted November 5, 2014 Share Posted November 5, 2014 It's used as an attention grabber as the limit doesn't end in a zero part of the highways safety for construction workers. Sometimes they use a 9 mph alternative just to keep them on there toes. Nice answer. I guess it also helps not confuse other drivers too. Link to comment Share on other sites More sharing options...
TimmyR Posted November 5, 2014 Share Posted November 5, 2014 ...and it seems to work, it's even resulted in a thread on here. I hope they're not reading this thread whilst driving. Link to comment Share on other sites More sharing options...
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