RSA 265:26 Driving on Divided Ways.

I. Whenever any way has been divided into 2 or more roadways by leaving an intervening space or by a physical barrier or clearly indicated dividing section so constructed as to impede vehicular traffic, every vehicle shall be driven only upon the right-hand roadway unless directed or permitted to use another roadway by official traffic control devices or police officers. No vehicle shall be driven over, across or within any such dividing space, barrier or section, except through an opening in such physical barrier or dividing section or space or at a cross-over or intersection as established, unless specifically permitted by public authority.
II. With the exception of any state, federal, county or municipal vehicle or any agent thereof, operating in furtherance of their offici