Tripod on Dual Carriageway bridge - scamera?

[Ranger 6]

Heading home today I spotted a man in a dayglow jacket on a bridge (A30 north of Winchester) with a substantial tripod. Couldn't see the camera very well as he was facing away from me looking down the other carriageway. He was standing with the tripod next to a beige Fiesta, no markings.

It's a known camera location as my PGPSW database pinged. My question is would a scamera operator be out of a vehicle like that, or is it more likely to be a surveyor?

[Ranger 6]

I did think so but at a known van location there were a lot of suddenly law abiding folk.... (me included!!)

[Ranger 6]

Camera was facing away from us but it didn't matter, I was on the right side of the limit - in a stream of traffic with a very observant driver at the front

[Ranger 6]

Looks like a survey location. Two blokes in deck chairs there yesterday. Saw them at 7am and still there at 5:15pm.