Never. The only time you can pass another vehicle on the right is if there is a lane on that side you can go into to pass it.
A DD form 626 inspection is for hazardous material transportation. The requirements for a vehicle to pass are for the driver to have appropriate paperwork and for the vehicle to have a CVSA decal.
A DD form 626 inspection is for hazardous material transportation. The requirements for a vehicle to pass are for the driver to have appropriate paperwork and for the vehicle to have a CVSA decal.
approaching an incline
Yes, it is legal to pass the postal vehicle, but only on the terms of the vehicle being on it's route (delivering mail). It would be illegal/unnecessary if the vehicle was not on route, and not doing any stops.
pass another vehicle.
it depends on what state your in. in most states they will not let it pass.
No, it will not pass the smog test with a defective or removed O2 sensor.
Because it blocks traffic and a vehicle might rear end it if the other vehicle can't brake in time, or other vehicles will be tempted to pass the slow moving vehicle in places when you are Not supposed to pass other vehicles and cause an accident.
In order to safely pass a vehicle at any speed, you need to have plenty of room to get around the slower vehicle. You shouldn't pass on a curve or a hill, and you should never pass a motorcycle in the same lane the motorcycle is driving in.
4x4 with spare tire
You can, but you may not!