Travel times on motorways can differ depending on the lane a driver chooses to drive on when traffic is not well-balanced over the available lanes. This also leads to underutilization of multi-lane motorways, with congestion setting in on heavily used lanes, while spare capacity is still available on other lanes. The proposed project will develop a first in its kind lane specific motorway traffic state control system to improve traffic flow efficiency. In order to achieve this goal, we will develop (i) a lane specific traffic state estimation and control model, (ii) a driver interface to optimize the compliance of the driver to lane specific advices and (iii) a vehicle positioning system at the lane level. The use of traffic flow simulation models, a driving simulator and an instrumented vehicle provide a realistic research environment, ultimately leading to a live prototype implementation in real traffic.