Methods Of Traffic Controlling

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Traffic calming measures are quite common in modern society. Traffic calming measures are physical design techniques that encourage or force motorists to drive slow and constant speed. They prevent speeding and can increase overall road safety. Traffic calming can also make streets more accessible and livable for other users such as pedestrians, cyclists and nearby residents. The main purpose of traffic calming measures is to reduce speed and create a safer traffic environment. Road bumps are one type of measures that is frequently used to reduce speed in residential areas. Traffic calming measures have to adapt to the specific condition of each location but in principle only one design of road bumps is needed. This design should lead to a comfortable crossing at speed lower than 15-20 km/h but as soon the speed increased it should be more uncomfortable to cross the road bumps. The design of ideal road bumps would make drivers hold their speed below 25 km/h at least when crossing a road bumps. Figure 1.1 describe roughly how road bumps influence crossing speed. The designs of road bumps influences experienced driving comfort and through that drivers speed. If a road bump is designed in a way so that the driving discomfort does not increase very much as the speed increases, driver see no reason to slow down before crossing a road bump. In many cases, drivers estimate the discomfort of crossing against decrease travel time. Drivers are prepared to experience more discomfort if it will decrease their travel time, at least to some level. Road bumps are installed in different environments, on streets that have different characteristics. Car parking, interaction with vulnerable road users and other things that make up the character o... ... middle of paper ... ...over entire streets, the layout design or spacing of speed bumps. Previous research from several countries suggests that to achieve overall speeds of 25 to 30 km/h, speed bumps should be placed between 40 and 60 meters apart. Greater spacing, up to 100 meters, can be used for speeds of 50 km/h. Bump spacing can be increased with the presence of additional traffic calming measures. 1.3.6. MATERIALS, MARKING AND SIGNAGE:- Speed bumps with all speed reducing measures, should be highly visible to warn drivers to lower speeds and avoid vehicle damage or loss of control. This essentially eliminates the potential for any legal liability on the part of the public road authority. Most countries have developed special signs and markings for their peed bump installations, and pre-warnings, design speed signs, contrasting materials and protective bollards are usually employed.

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