Avaliação do desempenho nos períodos de pico do tráfego de interseções semaforizadas com controle centralizado em tempo fixo e real

Abstract

Based on a case study of six signalized intersections operated by the Fortaleza’s Urban Traffic Control System – CTAFOR, this paper compares the performance of these intersections operating under TRANSYT fixed-time plans versus SCOOT adaptive control system, assessing, specifically during peak periods, the magnitude and degree of variation of the average delay and discharged volume at each approach of the intersections. The field measurements of both variables were implemented through video recording of the images captured from CTAFOR’s CCTV system. The procedure for determining vehicle delay resulted from an adaptation of the methodology presented in the HCM 2000. In general, the results found in this practical study match the conclusions based on computational simulations which suggested that the benefits of an adaptive control become more pronounced as the level of demand peaking increases.