Adding a pusher fan.

Anyone ever add a 16" or smaller pusher fan to the front side of the radiator to help from heating up when sitting in traffic? ( still running reg fan from water pump pully.- 22" 2 core champion rad.) When driving car it runs perfect, but sitting in traffic car starts to heat up quick.. can a elec fan work on the front to keep air flowing when stopped and still cool good when driving? - Thanks for any input!