It shall be the duty of the Police Department of this City to enforce the provisions of these regulations. Officers of the Police Department are hereby authorized to direct all traffic either in person or by means of visible or audible signals in conformance with these regulations, provided that in the event of fire or other emergency or to expedite traffic or safeguard pedestrians, officers of the Police Department may direct traffic, as conditions may require, notwithstanding the provisions of these regulations.
It is a violation for any person to do any act forbidden or fail to perform any act required by these regulations.
No person shall fail or refuse to comply with any lawful order or direction of a police officer.
The provisions of these regulations shall apply to the driver of any vehicle owned or used by the United States Government, the State of New Hampshire, or any political subdivision of said state and it shall be unlawful for any said driver to violate any of the provisions of these regulations, except as otherwise permitted by law or these regulations.
A. 
The provisions of these regulations governing the operation, parking and standing of a vehicle shall apply to authorized emergency vehicles as defined in these regulations except as follows: a driver when operating such vehicle in an emergency, except when otherwise directed by a police officer, may:
(1) 
Park or stand notwithstanding the provisions of these regulations.
(2) 
Proceed past a red stop signal or stop sign, but only after slowing down as may be necessary for safe operation.
(3) 
Disregard regulations governing direction of movement or turning in specific directions so long as persons and property are not thereby endangered.
B. 
The foregoing exemptions shall not protect the driver of any such vehicle from the consequence of disregard for the safety of others.
Every person propelling a push cart or riding a bicycle or any animal upon a roadway and every person driving an animal-drawn vehicle shall be subject to the provisions of these regulations whenever applicable.