In the heat

A little photographic 'note to self' about a project I'd like to do, though I wonder about its feasibility.
These delivery guys, swooping through the city in any weather conditions for delivery companies. From my perspective, their working lives look hard. I wonder what they think? I don't imagine their bosses would take kindly to the polite grey-haired woman asking for permission to do a documentary photography project, and I don't imagine that the guys themselves have much time to accommodate spectators either.
But they linger in my mind, I need to find a way to do it.