Driving cab door left open

[island]

Not necessarily. Drivers don’t have to wear a seatbelt for multi-drop deliveries assuming you’re stopping every few hundred yards I believe. Not just multi-drop deliveries, but if stopping that frequently that it is deemed not to be necessary.

It’s every 50 metres nowadays, so probably no longer usable by most. Would have been relevant to milkmen and maybe newspaper deliveries back when most houses were served.