A traffic management system of detection, lane control, variable message signs, and variable speed limits is used in Gotherberg, Sweden. Called Motorway Traffic Management it used in the Lundby tunnel and utilizes a system of loop detectors and video cameras to measure traffic volumes and speeds, for classifying vehicles, and for incident detection. Information is provided to motorist through a series of variable message signs. Lane control and variable speed limits are used to control traffic flow. Similar systems have provided a variety of documented benefits. In Amsterdam, the system reportedly reduced the "overall accident rate" by 23 percent, reduced the "serious accident rate" by 35 percent, and reduced the "secondary accident rate" by 46 percent. In Germany, the accident rate fell by 20 percent in areas where variable speed limit signs and lane control signals were used to warn drivers of congested conditions on the A5 autobahn between Bad Homburg and Frankfurt/West. On a comparable section of autobahn without control, accidents increased by 10 percent in the same time period. The Germans estimated that the payback in savings from the reductions in accidents would equal the cost of the system within two to three years after deployment.

Intelligent Speed Adaptation (ISA) monitors the difference in speed between a vehicles current speed and its suitable speed. Corrective action can then be taken, for example, if the vehicle is traveling too fast for the current speed limit. Road beacons are used to transmit a signal to the car and warns the driver. The systems can also be automatic. A test of a prototype system was conduced in Eslov, Sweden, in which vehicles where limited to 50km/hr. Once the speed was exceeded drivers experienced resistance in the accelerator and where unable to increase speed further. The test drivers indicated that the system was well received as a safety control feature and that it was not an unpleasant control or source of irritation. Behavior studies also showed that the interaction between the test drivers and other road users improved.

According to England officials, automated enforcement is important in maintaining compliance with variable speed limits. Detectors identify vehicles exceeding the speed limit while cameras mounted on overhead freeway signs photograph the license plate. The system has shown a very high compliance rate with speed limits, an increase in capacity by 5 percent to 10 percent, and a 25 percent to 30 percent decrease in rear-end accidents on the approaches to queues on the freeway.

Several European cities are also making use of real-time parking information. Primarily these systems are utilized in downtown areas. They usually consist of a set of detectors to count the number of vehicles entering or exiting garages or lots. Display of available parking can then be transferred to variable message signs informing drivers of availability of parking. Benefits have shown a reduction of up to 25 percent in downtown traffic volumes related to searching for parking spaces. These timely messages have also shown enhanced use of transit and improved use of park-and-ride lots serving transit when drivers are informed that parking is full.