In the US there are numerous sources of laws. The Federal government can specify things like maximum speed limits, indirectly through funding. States typically set the rules for the state. Other government units can set specific laws for their jurisdiction.
You can find road traffic laws at online shop that provides you road traffic laws with many choose of road traffic laws such as ebay.com, amazone.com etc. just try to visit www.ebay.com to find road traffic laws.
City Sets
It sets policy Apex ;P
downt= hte road
legislative
a government
There are no laws. Each company sets their own rules and most of them state no drinking on the job.
legislative
The US Constitution.
Slave codes
you get a ticket
The drivers of the vehicles comprising the traffic on the road guide this traffic, as the laws/rules of the road dictate.