• 駐車ちゅうしゃ — parking (a car)
• 駐車場ちゅうしゃじょう — parking lot; parking area
• 駐在ちゅうざい — being stationed somewhere (police, staff, etc.)
• 駐屯ちゅうとん — to be garrisoned; to station troops
• 駐留ちゅうりゅう — to remain stationed long-term (military, diplomatic)
• 駐とどまる — to stay; to remain in one place

On the left, the radical 馬 shows a horse. In older times, horses were tied and kept in one spot when riders stopped to rest. The right side gives the sound チュウ and adds the idea of remaining in place. Put together, 駐 expresses bringing a moving thing to a stop and leaving it there — like a horse at a post, or a car in a parking space.