Safety Guard Highway Rolling Barrier

The government is always looking at the latest technology that can ensure safety of road users, as outlined in the construction industry transformation plan.In India total accidents of 2016 are 489400 and in 2017 are 501423. Total number of persons killed in 2016 is 139671 and in 2017 are 146133. Total number of accidents on highways in 2016 is 137903 and in 2017 are 142268. A small Korean manufacturing company invented a new concept Longitudinal barrier, (The Rolling Barrier) which had continuous pipes covered with urethane rings. This study aims to evaluate the effectiveness of the Rolling Barrier and to understand the Rolling Barriers characteristics of crash cushioning, how to correct the vehicles running direction and the required strength of barriers. The Rolling Barrier satisfied the ministry of construction and transportations, “Guidelines for Installation and management of road safety facilities�. The Rolling Barrier can be effectively used in curved roads sections, ramps, medians and entrance or exit ramps in parking garages. In this paper, the description and studies of Rolling Barriers are elaborated and this paper highlights on the need for cost effective road safety investments using rolling barrier systems which can redirect the deviated automobiles onto the right path and also prevent the overturning of vehicles. Total barrier or guard-roll assembly comprises series of individual guard-roll barrier units spaced along one or both sides of a roadway. Each unit comprises support and guard structure rotatable about generally upright axis with upper portion closer to roadway axis to form overhang. When vehicle strikes one or more units they start rotating, attenuate impact, and redirect the vehicle. The overhand effect prevents climbing and keeps vehicle on ground. Impact surfaces are pneumatic low-pressure rubber tubes arranged to form frustocones rotating on vehicle spindle. They may also be of uniform diameter or may be single resilient conical bodies but are preferably series of heavy rubber tubes of variable diameter arranged to provide maximum surface to impacting vehicle. The attitude of the spindle may vary from vertical to permit use of uniform buffer elements. Barrier elements may be arranged in tandem parallel to the road shoulder to intercept errant vehicles and promote straight line attenuation. For positive arrest, elements are deployed in lead-in lines in paired sequences to promote pocketing. Lateral spacing between paired elements converge to attenuate by actuating wringer effect. Special pocketing arrangements may be used to trap and decelerate trucks at critical locations.