Sorry for the confusing title, this is kind of hard to describe. I just moved to western MA. In my new town, there is this road where on one side, the speed limit goes from 40 to 30, but on the other side, rather than having the sign saying the speed limit goes up to 40 directly across the road, it is located another 1/3 to 1/2 of a mile further, meaning that oncoming cars will be legally travelling at 40 MPH in the opposite direction, but just going by signs it appears to the cars travelling in my direction that the speed limit is still 30 (I have drawn a sketch of what I am talking about below since it's difficult to describe). I always wait until I pass my 40 MPH sign before I speed up, but everyone behind me gets annoyed and starts tailgating me if I don't speed up. Also, when I'm driving behind someone, they always speed up to 40 after passing the 30 MPH sign on the opposite side of the road, even if they were driving 30 before. My question is whether it is legal to speed up to 40 once I get past the point where oncoming traffic needs to slow to 30, since from my understanding speed limits always work in "zones" where the limit is the same on both sides of the road. Or do I technically need to wait until I pass the 40 MPH sign even though it's quite far away?

Sorry for my bad drawing skills enter image description here

  • Is the 30 MPH sign facing you or the opposing lane? – Andy Mar 17 at 23:42

The national standard, found in the Manual on Uniform Traffic Control Devices (MUTCD), indicates, in Section 2B.13 Speed Limit Sign:

03 Speed Limit signs, indicating speed limits for which posting is required by law, shall be located at the points of change from one speed limit to another.

It would not be legal to accelerate to the new speed before reaching the sign.

All states were required to adopt the MUTCD no later than 2012. This standard is followed by all states.

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