IF articles

The “Hourglass” model


When there is an anomaly of the motorway

traffic with drastic reduction of capacity, the almost immediate

establishment of a queue is frequent. The note shows

a generalized methodology to estimate the time needed to

travel along a route in which an incident has occurred

(even partial) forming a queue and with several possible

time evolutions to free the section. The method is applicable

to real situations in a motorway infrastructure with the

primary purpose of providing correct information to users

by means of variable message panels placed in a section

upstream of the incident. The methodology was developed

under a research agreement stipulated between the company

Autostrade per l’Italia SpA and the Department of Civil

and Environmental Engineering at the University of Florence

  • Luglio
Num. 8
Pag. 651