No ... most USPS vehicles that deliver mail in neighborhoods are right hand drive.
Yes, right hand drive vehicles are legal in the whole of the United States. Added: Most (all) states may require that the vehicle be equipped with certain supplementary mirrors however.
Yes, so long as the vehicle itself is properly registered with a current inspection.
Call Department of Public Safety for any vehicle registration questions.
I've seen plenty of right hand drive vehicles in Colorado so I'm sure it's fine, you can always give your local DMV a ring and ask though!
Yes, it is legal.
No, driving a motor vehicle on public roadways in Texas is considered a privilege, not a right.
yes
If you were importing a RHD vehicle the answer is no, but you are converting a vehicle to RHD. If you are a postal employee it is legal, but may or may not be for the average driver. I suggest you contact your local DMV to find out positively one way or the other before you proceed. It is legal in my state but may not be in yours. Find out from someone with the authority to tell you for sure.
If the vehicle is left hand drive, it is the right side. If the vehicle is right hand drive, like a horse, it is the left side.
I'm a rural mail carrier in GA which requires use of my own vehicle. Which also requires the use of a right hand drive vehicle (or a left hand drive that can be driven from the right side-have done that for yrs too). If it's not legal, then thousands of carriers like myself are breaking the law on a daily basis. I believe the answer is no. However, when hired by the USPS, you complete a course and receive certification for driving the right hand drive. Never received any papered proof of this, but I do remember being told that if you're not certified it is illegal. Hope that helps
Only if you know how to drive them
When you're passing another vehicle.