MITIGATORY MEASURES TO DECONGEST AND IMPROVE TRAFFIC CONDITION AT HEBBAL JUNCTION

Raja V, Sharana Basava H, Saddam Hussain, Venkatesh G, K.V.R.Prasad, Suresh B

Abstract: Bangalore city has seen an abnormal increase in vehicular population of over 10.2% in last ten years while the population is increased by 65% during the same period. The present day vehicular population is 52 lakhs. Hebbal Junction, situated on the Airport road is the major connecting road to International Airport Road , which is one among many traffic congestion zones in the city. With about 19157 PCU/hr (6917 PCU/hr at grade), It is also one of the busiest junction along ORR in Bangalore today. In order to make ORR through traffic Signal free, Grade Separation is essential at the junction. Further, there has been manifold increase in passenger car and bus traffic in perpendicular direction (along Bellary road) due to shift in Bangalore airport from HAL to Devanahali (KIAL). Considering the increase in traffic, NHAI has built 6 lane elevated road beyond Hebbal flyover leading to airport. The surface level road has been upgraded to 6 lane main carriageway with 2 lane service road both sides. Presently the traffic from these 16 lanes is converging to 4 lane flyover at existing Hebbal flyover which is bottleneck. In opposite direction the city bound traffic from Bellary road is converging from 10 lanes to existing 4 lane flyover resulting in traffic congestion. Hence there is a necessity to increase the capacity of existing flyover to cater for airport traffic and future traffic demand. Various objectives of the study includes to improve the geometrics of traffic parameters in terms of conflict points, to improve the speed flow characteristics, to prepare Mitigatory proposals plan for signal free vehicular movement,to work out the cost economics for Mitigatory proposal plan. As part of this study, The Topographical Survey and the traffic details including turning movements at various arms of the junction have been collected and analyzed and the Capacity of all the roads running through the junction have been calculated. Traffic Volume surveys were carried out to find out the peak and off peak hour traffic volume. The max peak hour traffic volume we found in the junction along a single road is 6200 PCU/hr. Proposals or Alternatives have to be planned to reduce congestion. Widening the roads will be complicated due to major commercial establishments developed along the edge of the road and removal of these establishments will be necessary in case of expansion of road to accumulate the future traffic.

Keywords: IMPROVE

DOI: https://doi.org/10.15623/ijret.2016.0523003