From Essential Hacks (http://www.simania.nl/sdls/eh/sdls-eh.htm):

Buyable pedestrian markers - Downtown

For accidental deletions (invisible, use move_objects cheat to buy and place). 
File: ExpansionPack3\PedMarkers.iff
Last uploaded: 03-01-2005
Catalogue: (Downtown) Misc, Misc.
Version: HD and upwards
