why dont u have an amber flashing light put on your van
That he will need richy i know because i have done it and will also need arrow signs or something simular, as you will be parking anywere next to traffic lights etc!
It`s not as straight forward as you think it would be!
Remember those signs are lit up at night so electrics are involved so you can`t just fire water everywere as for working hrs, can`t remember but i am sure that there is certain times in the day and night that you can carry this work out!
The times differ from area to area!