Following order of MassDot, Reading changes signs from 30 mph back to 35-40 mph on Haverhill Street.
Traffic impacts will allow crews to conduct highway lighting work.
MassDOT claimed ownership of a main Reading thoroughfare and imposed a higher speed limit that residents said is dangerous.
Two of the people in one of the cars had to be revived with Narcan.
There are heavy backups in both directions due to a truck fire in Reading.
There are major delays on the highways right now.