Saudi Journal of Civil Engineering (SJCE)
Volume-10 | Issue-03 | 33-41
Original Research Article
Analysis of Traffic Characteristics and Design of Traffic Signaling Control for Management of a Four-leg intersection at Nkwo Triangle Nnewi
Nwakaire C.M, Nwizu I.I
Published : March 23, 2026
Abstract
Movement is one of the major characteristics of every living thing. Transportation involves the movement of people, goods and services from one place to another and with increased population congestion is inevitable. Eastern mass junction Nkwo Triangle Nnewi North (Cross intersection) is not exempted from traffic congestion as it was taken as a case study for this work which focused on the analyses of traffic characteristics and design of traffic signaling control for management of busy intersections. Eastern mass junction Nkwo triangle Nnewi is connected by four roads leading Eastwards to the junction is Eke Amobi road, Westwards is First bank road, Northwards by Nnobi road and Southwards by Round-About junction road. The geometry of the junction is symmetrical towards North and South (8.1 meters) and asymmetric towards East (13.425 meters) and West (12 meters). Based on traffic volumes converted to the PCU values, a traffic signaling scheme was designed mostly based on the Webster’s method of signaling design using the geometries of the roads leading to this junction. Results from signal design showed an optimum cycle lengths of 73 seconds with total effective green times of 55 seconds and amber time of 5 seconds. The designed traffic signal is recommended for Eastern mass junction and other similar junctions to improve their traffic characteristics and reduce the demerits of congestion and delays.