The attack occurred on a principal road that army trucks share with civilian traffic.
Colorado State Highway 67 is the principal road through the area.
Traffic within the city itself is restricted, with some principal roads being completely pedestrian areas.
He led them in a wide arc around the principal road.
Most small towns of any significance lay on the principal roads; some also enjoyed the advantages provided by a nearby river.
The N11 is the principal road running through the city with the R34 being the alternate route.
For many small towns, the main street forms part of the principal road into, or through, the town.
Most of the principal roads have been converted into limited access highways known as autovías.
The principal road in the suburb is the A167.
In perhaps the worst affront, the land was right along Highway 101, the principal road through the area.
