Changes

The main highway vectors are the [[Quebec_A-20|A-20 ]] ([[Transcanadian Highway]]) which goes East-West from the border of [[Ontario]] through [[Montreal]] until the border of [[New Brunswick]] passing on the south shore of the St-Lawrence river.

Highway [[Quebec_A-40|A-40 ]] follows the same path on the north shore of the St-Lawrence, going through [[Trois-Rivières]] and ends up in Quebec city. The connection between those two main highways can only be made through one of the few bridges crossing the St-Lawrence at few specific points.

* in [[Quebec city]] in the east by the Pont de Québec and Pont Pierre-Laporte (highway [[Quebec_A-73|A-73 ]] which connects [[Maine]]/USA to the Saguenay/Lac-St-Jean ([[Chicoutimi]]) area through Quebec city.* in [[Trois-Rivières]] in the middle part of the province by the Pont Laviolette (highway [[Quebec_A-55|A-55 ]] which connects [[Vermont]]/USA to Lac-St-Jean area through [[Sherbrooke]] and [[Trois-Rivières]]* in [[Montreal]] in the western part of the province by several bridges through the metropolitan Montreal area. (highway [[Quebec_A-10|A-10 ]] which joins the [[Quebec_A-55|A-55 ]] in the East near [[Sherbrooke]]; highway [[Quebec_A-15|A-15 ]] which connects [[New York state|New-York]]/USA to the Laurentides area and [[Ottawa]]. As [[Montreal]] is an island, other bridges also connects to the mainland either on the East or West and also to the North through [[Laval]] island