赶路 is a separable verb (离合词) meaning 'to hurry along one's journey' — you're traveling and need to make progress, often because of time pressure. The verb 赶 and the noun 路 can split: you can insert a duration (赶了一天的路 'rushed for a whole day'), a measure word (赶一段路 'cover a stretch'), or a complement (赶不上路 'can't catch up with the journey'). Unlike 走路 (just 'walk'), 赶路 emphasizes urgency and forward movement toward a destination.