Yīlùshang, dǎoyóu xiángxì de jièshào le dāngdì de lìshǐ.
Along the way, the tour guide gave a detailed introduction to the local history.
Tips
usage
一路上 can describe physical travel ('along the road') or a figurative journey ('throughout the process'). It's often placed at the beginning of a sentence as a time/place phrase.
usage
一路平安 = 'safe journey' - a common farewell phrase. 一路顺风 = 'bon voyage' (lit. 'smooth wind all the way').