While they're standing around leaning on their shovels and brooms so they don't fall in, they'll need at least 4 lollypop men and two sets of timed traffic lights, plus the usual 100 cone markers and 100 barriers, at least 2x 60 kph signs and 10x 40 kph signs. Should cost around half a mill by this afternoon half of which will be recouped by Cops with radars.