Assessment of Traffic Characteristics at Major Urban Road Intersection of Kathmandu Valley: A Case Study of Khanivivag, Kesarmahal, and Narayanhiti Intersections

DOI: https://doi.org/10.46610/JOCCE.2024.v010i01.003

Abstract

This study addresses the prevalent issue of traffic congestion at critical intersections in urban
areas, leading to slowed traffic and increased queue lengths. The centralization of the
Kathmandu Valley has contributed to a gradual rise in population thus impacting the efficiency of
the traffic management system. This study focuses on three of the busiest intersections of the
valley i.e. Kesharmahal, Narayanhiti, and Khanibhivag intersections and aims to provide
insights into current traffic conditions and propose measures for enhancing traffic flow. Data
collected is analyzed to determine current traffic flow, saturation flow, existing capacity, Level of
Service (LOS), and intersection delay using the HCM Manual. The analysis involves assessing
present conditions and making comparisons with standardized data. Three days of traffic volume
data during peak hours and geometric features of the intersection were gathered. Results indicate
that the intersections are experiencing over-saturation, exceeding their capacity based on
existing geometry and signalization. Additionally, the vehicle replacement strategy showed
limited effectiveness in reducing saturation flow, with the flow persisting at an over-saturated
level. These findings highlight the need for targeted measures to address the challenges posed by
congestion and enhance the efficiency of traffic management at these intersections for smooth
traffic flow.