Basecamp

I have just started to use basecamp, I have been using mapsource for years, a whole new learning curve. I have made 2 waypoints, and asked B C to make a route, the two waypoints are connected all the way by motorway, the driving time is about 50 min to 1 hour, with a distance of about 45 miles, but B C has come up with a route of about 100 miles with a time of 2 1/2 hours, is there a filter to choose fastest route, inc motorways I have to use.

Thanks