There is a very extensive system of carriage roads in Acadia NP. There are signposts along the way that match the park maps so that navigation is made easy (except we still got lost). We decided to stay on the main way towards the Jordan Pond gate lodge and have popovers which cost a bit more than in town, but they were very good. It was also blueberry season during our visit, so we enjoyed a few of those as well. On a later visit, we had lunches made in town, and we brought that as a picnic lunch as an alternative.
We decided that the carriage road would be our only plan for the day which took any pressure off of trying to rush through to get somewhere else. There are many bikers and pedestrians on the trail and it is not all flat. We used mountain bikes, but we have a friend who used one of those bikes that is mostly a road bike but can do some off road trails and it worked out well for her. Overall our recommendation is to get the map from the visitor's center and allow for more time that you think you need.