Editing Semi-trailer truck (section)

===Canada===
Regulations vary by province. A license to operate a vehicle with air brakes is required (i.e., normally a Class I, II, or III commercial license with an "A" or "S" endorsement in provinces other than Ontario). In [[Ontario]], a "Z" endorsement<ref>{{Cite web|url=http://www.ontario.ca/page/ministry-transportation|archive-url=https://web.archive.org/web/20070821052503/http://www.mto.gov.on.ca/english/pubs/drivhand/airbrake.htm|url-status=dead|title=Ministry of Transportation &#124; ontario.ca|archive-date=21 August 2007|website=www.ontario.ca|access-date=11 March 2023}}</ref> is required to drive any vehicle using air brakes; in provinces other than Ontario, the "A" endorsement is for air brake operation only, and an "S" endorsement is for both operation and adjustment of air brakes. Anyone holding a valid Ontario driver's license (i.e., excluding a motorcycle license) with a "Z" endorsement can legally drive any air-brake-equipped truck-trailer combination with a registered- or actual-gross-vehicle-weight (i.e., including towing- and towed-vehicle) up to 11&nbsp;tonnes, that includes one trailer weighing no more than 4.6&nbsp;tonnes if the license falls under the following three classes: Class E (school bus—maximum 24-passenger capacity or ambulance), F (regular bus—maximum 24-passenger capacity or ambulance) or G (car, van, or small-truck).

A Class B (any school bus), C (any urban-transit-vehicle or highway-coach), or D (heavy trucks other than tractor-trailers) license enables its holder to drive any truck-trailer combination with a registered- or actual-gross-vehicle-weight (i.e., including towing- and towed-vehicle) greater than 11&nbsp;tonnes, that includes one trailer weighing no more than 4.6&nbsp;tonnes.<ref>{{cite web| url = http://www.mto.gov.on.ca/english/dandv/driver/classes.htm| title = Ontario drivers classes}}</ref> Anyone holding an Ontario Class A license (or its equivalent) can drive any truck-trailer combination with a registered- or actual-gross-vehicle-weight (i.e., including towing- and towed-vehicles) greater than 11 tonnes, that includes one or more trailers weighing more than 4.6 tonnes.