Traffic congestion has been a problem in most of the developed and developing countries and is increasing. The cause may be due to several factors such as huge industrialization, increasing in population, urbanization, motor vehicles production, trip attractions etc.,causing huge traffic volumes in urban cities. Poor traffic signal timing contributes to traffic congestion and delay. Conventional signal systems use pre-programmed, daily signal timing schedules. Adaptive signal control technology adjusts the timing of red, yellow and green lights to accommodate changing traffic patterns and ease traffic congestion. The study aims for feasibility of the ATSC technology for an Indian traffic conditions, for which factors which have direct impact on the user are involved, that is queue and delay. A comparative study, has been done with that of scenarios and existing field conditions. The data along with optimization strategy is been input to the software. Five scenarios that are Morning Off Peak, Morning Peak, Mid-day Off Peak, Evening Off Peak, Evening Peak for different actuation type signals have been performed. Delay and Queue lengths are key features that have direct impact on the user are considered. Results showed an overall decrease in delay for actuated type signals compared to fixed and existing signal timings. Most of the intersections had 30% reduction in delay. Comparative to fixed signals actuation type signal perform better when both cycle time and delay are considered. When fully actuated is not performing then we can utilise semi actuated type. In all the different scenarios considered fully actuated signal has been performing well in compare to other two types.
Chilveri Srinath and Moses Santhakumar S
General, Urban Mobility