Tuesday marked the start of phase two of the roll-out, covering about 200 schools in Blacktown, Sydney, Ryde, Sutherland, Tweed, Willoughby and Wollongong.

The lights will be installed at 300 more schools from November 2014, and another 300, including those in Shellharbour, starting in February 2015.

The roll-out will ultimately equip every NSW school with flashing lights by the end of 2015, at a cost of $32 million.

The flashing lights have already been installed in school zones in Kiama.

NSW Premier Mike Baird said the roll-out of the lights would reach 100 schools a month.