Playing this game reminded me of a game called 'mob rule' which is the sequel of constructor, published in 1999. (constructor was a game from 1997)
Here you can download the
demo version of mob rule:
http://www.download.com/Mob-Rule-dem...19-916278.html
It's not abandonware yet... too bad...
.EDIT. I guess this is the same game as 'street wars' but under another name.