This was the only way to cross rivers on foot.

Frank parked at a dead end, and the boys crossed a field on foot.

People enter and leave by crossing a bridge on foot.

I'd crossed the room on foot before anyone else had even reacted.

They would have to cross the distance on foot, possibly under fire and almost certainly against enemies.

They abandon the hand car and start crossing on foot.

Here it is quite dangerous to cross the roads on foot.

I had to leave my car down the road and cross the field on foot.

He adds that crossing the planet on foot will take months.

Crossing on foot would have been even more hazardous than by car.