On Wednesday, July 29, 2015 at 11:44:44 PM UTC+1, Dr J R Stockton wrote:
What nowadays is the maximum allowed width for a road vehicle in
ordinary service, such as a refuse collection vehicle, a removals van,
or a skip lorry?

How much total width should be available for a qualified but not
unusually talented driver in such a vehicle to reverse along, on the
straight?

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(c) John Stockton, Surrey, UK. 拯merlyn.demon.co.uk Turnpike v6.05 MIME.
Web http://www.merlyn.demon.co.uk/ - FAQish topics, acronyms, & links.

The answer to the first half is readily available on the web. 2.55 metres excluding mirrors or 2.6 metres for a refrigerated vehicle.

The second half will need an experienced lorry driver or instructor to answer. With a car there is always a risk the wheel being turned slightly when the driver turns to look over his shoulder.