Federal Motor Vehicle Safety Standard (FMVSS) 108 requires all vehicles manufactured after August 1, 1968, to have electric turn signals. This applies to vehicles of all lengths.
However, some states may have specific regulations regarding turn signals on vehicles of a certain length. It's always best to check with your local Department of Motor Vehicles for any state-specific requirements.
Important: Even if your vehicle is older than 1968, it is still recommended to install electric turn signals for safety reasons.
