why the two?
well one keps you safe and one enslaves you.
you are kept free under the LAW and you are enslaved under legal rules and regulations.
if i cause harm or loss then i have broken the LAW and recompense must be made.
if i travel on my bike what harm or loss have i caused............................. none

so i have not broken the LAW.   thats right i have not broken the LAW.
however i have contaviened a statute a legal contract and it has a monetary penalty..... you will probably find that all statutes have a monetary penalty. (money is a separate enslavement)
To make one thing clear a contract is a mutual agreement between two or more parties. Ask your self this ... when did you contract with anyone to allow you to travel on the roads and when did you agree to keep to certain speeds..................................................