RIRO - O N T H I G H W A Y S
RIRO type expressway - This is a divided highway that isn't truly limited access. To picture what a riro is I think it is best to imagaine a typical undivided 4-lane road to start. To RIROize this road, a centre median would be installed between the two opposing directions of traffic, therefore only allowing Right-turns-In, and Right-turns-Out. Houses and businesses are allowed to leave their roadside exits, unfortunatly this causes major operational concerns on a busy highway, considering RIRO highways in Ontario have a posted speed of 90km/h (and an actual speed much typically much higher). Every few kilometres or so a bridge is installed to facilitate traffic needing to cross the highway; these bridges also act as 'turn around points' allowing traffic to reach a destination that is only accessible from the opposing direction of flow. At proper intersections a small traffic island is installed to direct traffic in this Right-on, Right off Fashion.
Looking
North from Lovkin Road overpass at the centreline of Highway 35/115
.jpg)
Focusing
on the NB RIRO at Lovkin Road
Note that usually a RIRO would have its own dedicated accel/decel lanes but Lovkin Road (which is the first NB RIRO on 35/115 in between Highway 401 and Highway 2) is dwarfed by both the Highway 2 and Highway 401 interchanges, and this RIRO has certainly outlived its usefulness.
Copyright (c) 2004-2007, Scott Steeves (Webmaster) webmaster@onthighways.com
Page last updated: April 30th, 2004
Page created: April 5th, 2004
