6TH International Congress on Technology - Engineering - Kuala Lumpur3 - Malaysia (2018-07-19)

Traffic Impact Assessment Of Mohakhali Flyover

This paper aims to delve into the inquisitive understanding regarding the impact of Mohakhali Flyover on roadway segments along the corridor and also adjacent to the flyover. Traffic flow and congestion degree have been estimated to justify evaluation of performance of the flyover. Level of Service (LOS) of individual segments as well as that of the overall facility have been evaluated according to the Highway Capacity Manual by Transport Research Board. To the best of author’s knowledge, no studies have been previously done in Dhaka to evaluate level of service of links in the influence area of its flyovers. This paper has evaluated the performance of segments during weekday day, which represents the worst traffic conditions. 15-minute classified traffic count along the corridor of Mohakhali Flyover revealed average traffic flow of 2046 pcu/h at grade and 4330 pcu/h above grade, indicating that one-third of traffic uses at-grade facilities. The average speed along entire facility was calculated to be 8.18 km/h, which is only a little faster than the average walking speed (5 km/h). Free flow speeds measured at various periods of measurement varied from 60-85 km/h, with larger speeds above grade. In addition, bus stoppage rate, parking maneuver rates and cycle times were measured to identify the Level of Service. LOS F was found at each segment and also at the total facility, suggesting very poor traffic conditions. Such findings have the potential to provide proper guidelines to the appropriate authority to adopt any policy to tackle the problem of prodigious traffic growth in Dhaka city.
Nafis Anwari, Md. Rakibul Islam, Md. Shamsul Hoque