Why should they follow the law on the bikes? when was the last time you ever saw a highway state patrol car anywhere NEAR the speed limit.
Police officers can do things that are prohibited by civilians.
if the officer is in the US: No they are not allowed to violate the law nor are they seperate from civilians. The police are civilians they are subject to the exact same laws as the general population.
The military personel are not civilians as there are not subject to either the US constitution and subject to local civilian laws and the UCMJ which allows double jeopardy if in violation of a civilian law. i.e public drunkeness. you get the civilian court punshment + the ucmj punishment.
additionaly military personnel are not subject to the benefits given in the constitution that a civilian law enforcemnt officer has. search and seiziure and so forth.