Layout for dosing of traffic, strategies and principles for dimensioning (SVI2001/538)

These are the most interesting results of the project:

• The capacity of bottlenecks and their congestionpoints are often situated in tricky spots regarding housing estates (noise,exhaust fumes,image of developement) as well as the traffic system (especially the obstruction of public transportation but also regarding slow traffic and security).
• The traffic congestions should be transfered to places with more ideal conditions and where they do not have a negative effect on settlements and other parts of the traffic system.
• Normally the motorists experience less waiting time through traffic regulations, but the waiting times apear in different places of the traffic system.
• If the traffic congestions are moved to the border of settlements, the time needed by the through traffic rearly changes.
• The conditions for locally produced traffic are improved but the inbound traffic can experience extra time loss at the places where traffic is held back.This solution is functional only in the case of limited local traffic. A lot of local traffic would result in delays for throughtraffic. At that point the outbound traffic has to be limited and regulated.
• The most common and widespread type of keeping back traffic is an intersection with traffic lights. The motorists are used to waiting at a red light and accept that fact. If the traffic light is used by public transport then the light has to be adjusted to its needs. A traffic light should not only regulate the traffic but should also allow only as much traffic as the further intersections can cope with.
• An ideal spot to keep back the traffic often is the border of settlements as the quality of living is little influenced by congestions and because there often is enough space to include or add a separate lane for buses. If there is no intersection at the border of a settlement and no sidestreets, then one has usually hesitated to build a traffic light on open road.There are several examples where such has been done. The motorist has to be advised on the spot of this unusual situation. Different solutions have been chosen for this signalisation. One should look into standardising. To force the drivers to respect the new light, red light cameras have been installed on open road. With newer installations one has foregone the red light cameras. 
• Regulation can lead to improvement of the situation not only on roads in settlements but also on motorways. On one hand the experience has been made