The Merg
Golden Member
- Feb 25, 2009
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Not in the US. There has to be a 45 zone in between.
FHWA mandates that state and federal highways, the maximum speed drop is 10mph between adjacent speed zones, and a maximal drop of 15mph when transitioning from limited access to non-limited access. Each speed zone also has a minimal segment length, designed to prevent this type of situation.
I wasn't trying to imply that the speed needed to drop from 55 directly to 30, but just that there was a drop in the limit from one to the other. If there was a drop first to 45 and then 30, so be it.
- Merg