Trailers are included in gross weight (GVWR.) In most areas, trailers are classified as a vehicle but not a motor vehicle. They require a separate inspection, license plate/registration and sometimes their own insurance policy or a policy rider.

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1987 300D (230,000 mi on a #14 head-watching the temp gauge and keeping the ghost in the machine)
Raleigh NC - Home of deep fried sushi!

Except reefers, they have a diesel engine running the compressor.

I've heard that CA has a law restricting how long semis are allowed to idle.

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DJ


84 300D Turbodiesel 190K with 4 speed manual sold in 03/2012

NY has the same law . You can only idle for three minutes

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"I have no convictions ... I blow with the wind, and the prevailing wind happens to be from Vichy"

Current
Monika '74 450 SL
BrownHilda '79 280SL
FoxyCleopatra '99 Chevy Suburban
Scarlett 2014 Jeep Cherokee
Krystal 2004 Volvo S60
Gone
'74 Jeep CJ5
'97 Jeep ZJ Laredo
Rudolf ‘86 300SDL
Bruno '81 300SD
Fritzi '84 BMW
'92 Subaru
'96 Impala SS
'71 Buick GS conv
'67 GTO conv
'63 Corvair conv
'57 Nomad

Many states do, some counties and cities do, also. It all depends on local jurisdiction.

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1987 300D (230,000 mi on a #14 head-watching the temp gauge and keeping the ghost in the machine)
Raleigh NC - Home of deep fried sushi!