The Oregon Transportation Commission (OTC) has voted to increase the speed limit for trucks on portions of several interstate highways to 60 mph from 55 mph.

The increase will take place before the end of the year and for stretches where the passenger vehicle speed limit is 65 mph. Oregon is one of seven states that do not have uniform speed limits on interstate highways.

Officials said truckers were averaging 60 mph in these areas and raising it would help improve overall traffic flow.