That you are not permitted to do it when other traffic is coming behind you basically.



Sec. 14-243. Starting or backing vehicle. (a) No person shall move a vehicle which is stopped, standing or parked unless such movement can be made with reasonable safety and without interfering with other traffic, nor without signalling as provided by section 14-244.

(b) No person shall back a vehicle unless such movement can be made with reasonable safety and without interfering with other traffic.

(c) Violation of any of the provisions of this section shall be an infraction.

(1955, S. 1396d; February, 1965, P.A. 448, S. 25; P.A. 75-577, S. 87, 126.)

http://cga.ct.gov/2011/pub/chap248.htm#Sec14-243.htm