The traditional and important road safety benefits of lower vehicle speeds include saving lives and reducing the impact and likelihood of crashes. However, speed reduction has important additional benefits that increase the quality of life for neighborhoods and bigger urban areas, but also for society at large. Speed reduction measures fall into the categories: direct – infrastructure, vehicle technology and enforcement and indirect – signage, education and publicity. Similar a small decrease in average vehicle speed across a road network will lead to a considerable reduction in traffic fatalities and the severity of injuries. In this paper, study was carried out on types of speed reduction infrastructure and their utility to reduce the speed of vehicle. High Speed of vehicle get uncontrolled on curve, so in this paper more attention given to application of speed reducer infrastructure on curve.
Road traffic crashes are a major cause of death and disability. The speed at which a vehicle travels is an important determinant of injury; the faster the vehicle is travelling, the greater the energy inflicted on the occupants during a crash and the greater the injury. Excessive speed (driving faster than the posted limit or too fast for the prevailing conditions) has been found to contribute to a substantial number of crashes. It is predicted that, if the number of speeding drivers is reduced, both the likelihood and severity of a crash will be lowered. Various direct infrastructure could be incorporate to reduce the speed of vehicle. Edge stripping is one of the best infrastructures to reduce the speed on curve. Many times speed of vehicle on curve is more than the design speed of curve and which leads accident.
The direct infrastructure presented is not meant as a contest for the best solution for speed management. These methods are complementary and, when feasible, should all be applied at the same time.
Both manual and automated speed enforcement, as gatekeepers of proper driving behaviour, are a crucial cornerstone of road safety. Besides the new automated speed enforcement methods and technologies, regular manual speed enforcement by police officers remains indispensable as an important speed management measure.
One of the key aspects to improve road safety is to reduce the average network speed of all vehicles on streets, roads and motorways. This reduces the aggregate level of energy in the road network and will pay off quickly in fewer and less serious crashes and thus casualties and injuries. Research work is needed on proper location, size of direct infrastructure application along with sign convention of direct infrastructure