Choosing suitable micro controller for Intelligent Traffic Light System

• Our first challenge was to find a suitable micro controller for this system. For this we consider following facts,
  
  • It have to control unknown number of lights belong to traffic lights. Most of the time it will more than 30.
  • It have to communicate with a laptop via Bluetooth or other wireless communication method.
  • It have to read unknown number of sensor values, most probably  less than 10.
  So considering above facts we choose the micro controller PIC 18f452 (http://www.microchip.com/wwwproducts/devices.aspx?ddocname=en010296) To fulfill the above aspects we have found some mechanisms.