Roadside emissions check

[tosspot]

Hello,
I’m sure there are people out there that can answer this conundrum.
Last week I was travelling home from work (Leeds to Sheffield A61) & I saw what appeared to be a speed camera on the oncoming carriage way, but on closer inspection the equipment was too involved i.e. there was 6 number small tripods with infra-red thingies atop (3 either side of the road)& 2 big tripods with what looked like cameras with zoom lenses on pointing towards the rear of passing cars. The vehicle accompanying this lot said on the side ‘Industrial emissions standards’(or something to that effect.
The question is, can your vehicle emissions be checked as you drive by ?
I ask this as I have just spent forever making easily removable cats for my car that could be inadvertently left out when ‘servicing’ post SVA/MOT which could get me into trouble if caught.

[neil still building it]

not so easy when the lorries ,they'd theoretically be checking ,have roof high 'stacks'( like sidepipes only vertical)- hence why they fit them ....
bit of a bugger for the mot man too ha ha
neil

[Noel]

What are you building Neil?

[tosspot]

Originally Posted by neil still building it

not so easy when the lorries ,they'd theoretically be checking ,have roof high 'stacks'( like sidepipes only vertical)- hence why they fit them ....
bit of a bugger for the mot man too ha ha
neil

Thanks for that Neil, so its for lorries only is it ?

[neil still building it]

Originally Posted by Noel

What are you building Neil?

hi noel , i'm (slowly) building a RAM ,putting it together how and when i like...
keep changing my mind ha ha
cheers
neil

[neil still building it]

Originally Posted by tosspot

Thanks for that Neil, so its for lorries only is it ?

hi , mostly diesels i would think ,lorries or cars etc -particulates ie soot
neil