side road 
noun
A minor or subsidiary road, especially one joining or diverging from a main road.A blue Renault Megane was found abandoned a short time later on a side road between Tyldesley Road and Millers Lane....
- One day they decided to change plans and took a side road while driving through the countryside and stopped to have a small picnic.
- You are driving down a road, and a vehicle in the oncoming lane wants to turn across your lane unto a side road.