• Ben- Edigbe, J Universiti Teknologi Malaysia, Skudai, Johor, Malaysia
  • Mashros N Universiti Teknologi Malaysia, Skudai, Johor, Malaysia


 Traffic lights are essential part of intersection control system. They are designed to maximise the efficiency of traffic operation and inform drivers on when to stop (red), proceed with caution (amber) or stop (red). Drivers are able to see two signals (primary and secondary) on approach and those waiting at the stop line must have an uninterrupted view of at least one. Composite control systems at intersections are normally made up of two or more traffic control devices; for example, roundabout and traffic signals combined or if you like, traffic signal and one way flow combined. While control strategy of traffic signal is flexible; it hinges on vehicle actuation or fixed time operation. In developing composite signalised intersection control system, there are some vexing traffic safety issues worth considering at signalised roadways; for example, in the event of signal breakdown or malfunction, how would such intersections cope with gridlock; what are the delay trade-offs for installing a standard roundabout at existing signalised intersections or vice versa. As a consequence, delay and phase movement studies were carried out at a signalised intersection in Skudai, Malaysia during peak period. Data for single and composite signalised intersections were  analysed and compared. Results show a slightly improved level of service with roundabout, more importantly significant reduction in conflicting movement and gridlock was achieved when the traffic signals were switched off. In addition three stage settings were the preferred option at peak period. The study concluded that at signalised intersections, composite traffic control mechanisms have significant influence on vehicular conflict and gridlock compared with single control devices.

How to Cite
EDIGBE, J, Ben-; N, Mashros. CONSIDERATIONS OF COMPOSITE SIGNALISED INTERSECTION CONTROL SYSTEM. EACEF - International Conference of Civil Engineering, [S.l.], v. 1, p. 035, aug. 2011. Available at: <>. Date accessed: 19 may 2024.
Group of Infrastructure Engineering