From 1926 on the Dutch TT was held at Assen on a street circuit through De Haar, Barteldsbocht, Oude Tol, Hooghalen, Laaghalen and Laaghalerveen.
In 2000, a new Race Control tower was built, as well as 34 newly equipped pit boxes, a new media and medical centre.
The Mandeveen and Duikersloot corners have been moved back by 10 metres to accommodate larger run-offs and gravel beds at the southern part of the circuit.
In order to improve the gravel run-off length, the grandstand was made in a 'floating' manner to accommodate the extra space that was needed.
On 21 September 2009 it was announced that a new chicane will be added, after a request from the A1GP organization,[3] however A1GP was unable to start the 2009–2010 season and as a substitute the Superleague Formula replaced A1GP.
The current track has a length of 4.555 km (2.830 mi) with the mixture of super fast flat-out and slow corners.
[4] The curves in Assen were traditionally banked and the surface is extremely grippy, so the riders were able to drive much faster on the course than other circuits.