You may wish to consider the following for planning your race weekend travel to TT Assen Circuit:
If you are planning to drive you will need to take the A28 and exit at Junction 32 (Assen Zuid) and the circuit is well sign posted. Parking is on a first come, first served basis.
In order to get to the circuit it is possible to get the a train which runs from Amsterdam Central Station to Assen, it is then possible to pay for a shuttle bus from Assen to the circuit.
The interactive map below shows the location of TT Assen Circuit. Use the controls to view the circuit as a traditional map or as satellite images, move around, and zoom in and out.