Simulation and modelling of vehicle's delay at semi-actuated signalized intersections

• Type: Article in International Conference Proceedings Book
• Date: 2004

Authors

Maria de Lurdes Simões (Author) FEUP; Paula Milheiro de Oliveira (Author) FEUP; Américo Pires Costa (Author) FEUP

Conference proceedings International

Title: COMPSTAT - Proceedings in Computational Statistics

Pages: 1823-1830

COMPSTAT

Other information

Abstract (EN): Our aim is to analyse if the value of a given unitary increment to the green time, in intersections regulated by semi-actuated traffic signals, may result in significant changes in drives average delay, which is an important factor in the optimization of intersection performance. A longitudinal data analysis was applied to urban traffic simulations. Three scenarios with different unitary increment values for the green time were considered. A mixed-effects model relating the response to the average delay and the covariates has been established, the covariates being functional relations of the experimental variable. The latter represents the hourly debit of vehicles in the main street. We conclude, that models resulting from a combination between a second degree polyniminal and an exponential term, are adequate. The unitary increment of green was shown to have a significant effect in the response, both in less intense flow rates and when the flows approach the maximum capacity of the intersection leg. Some numerical results and a brief comment on the use of queues with server vacations in this context is included at the end.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 8