A new numeric signalization system for pedestrians, called a digital countdown device, was experimented at two intersections in Ville Saint-Laurent in 1992. The cost of installing it is known, but it is necessary to develop a methodology for evaluating the benefits.
The primary goal of this project is to measure the costs and benefits of installing a digital countdown device and to verify that the new signalization system is economically and socially viable. In particular, the economic and social benefits of installing a numeric system intended to increase pedestrian safety must be evaluated.
One way to measure the effect of a digital countdown device is to study the change in the number of victims over a given time span using multivariate regression. For a more detailed description of the effect of a digital countdown device, it is also possible to analyze its marginal effect on the probability that a pedestrian is involved in a pedestrian-vehicle conflict while crossing an intersection. Calculation of the probability of a conflict can be performed with the aid of a multivariate statistical model that verifies whether use of a digital countdown device affects the probability of a conflict.
Évaluation économique de l'implantation d'une nouvelle signalisation numérique : le décompte visuel
Final reports are available for loan from the
Transports Québec Documentation Centre.
Results and recommandations:
Results indicate that installing digital countdown devices at two intersections in Ville Saint-Laurent reduced the number of traffic conflicts involving pedestrians significantly. On the other hand, research results do not permit quantification of benefits in terms of accidents resulting in injury or death. The period following installation of the countdown device is too short to arrive at a definitive conclusion.
for Ministère des Transports du Québec:
Direction de la sécurité en transport
700, boulevard René-Lévesque Est, 16e étage
Laboratoire de sécurité sur les transports
Université de Montréal
Centre de recherche sur les transports, Succ. A