J.F.
I would even say babies that age usually need 2 naps a day still. But if you think one is ok for him, I would just try moving it up. I'm not one of those that thinks you shouldn't wake a sleeping baby - the opposite actually - wake them to keep them on a schedule, it's for their own best health. Try putting him down for a nap at noon or right after lunch whenever you eat. Then he should be able to get in 2-3 hours if he needs it and still go to bed at a reasonable time at night. Have a good routine for naps that you stick to. We read books, then rock, then put them down. And we do it the same every time so they know what to expect and it helps lull them into sleep. I wouldn't suggest continuing with the car ride to get him to sleep. It will only further his need/desire for it and you'll be doing it for years to come.. or else make it that much harder to stop later. Stop now and get into a good routine for naps. And then give it a week or so too. Even if he doesn't go to sleep, put him in his crib and leave the room. Stay consistant so he knows this is naptime and what he's expected to do. Hope that helps. :)