Trip to Slovakia via Germany and Czech Republic
Planning the first day: Courtesy of RAC route planner, it should be here:
Here's the route. Interestingly the RAC says it should take 4 hours and 39 minutes. I put the same start and end point into my Garmin Zumo and it estimates 3 hours and 39 minutes with the same route. Maybe the motorcycle-orientated GPS expects you to go faster. The Michelin route planner is also useful.