Quote:
Originally Posted by vid
I thought it was odd initial numbers (10, 30, 50, etc) south of the river, even ones (20, 40, 60) north of it?
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To address this more directly, the numbering system features odd numbers for north-south autoroutes and even numbers for east-west.
Also the numbers rise in order from west to east and south to north.
The westernmost autoroute is the 5 in Gatineau, and the easternmost is the85 that is being built towards NB in the Bas-St-Laurent.
Likewise the southernmost even numbered autoroute is the 10 in the Eastern Townships.
Also three numbered autoroutes tend to be spurs and branch routes of the main highways numbered below 100.
There are some exceptions.
The numbering scheme is very similar but not quite identical to the Interstates.