An intersection with fully functional traffic lights!

A working traffic lights system with red, green and yellow lights!  It works in two phases, one grants green to N-S and red to E-W, and the other is vice-versa.
The map is a bit laggy on weaker machines because of the redstone circuit that measures time between the phases. I am looking into alternative methods to reduce this inconvenience.
Please fav+give diamond if you like it.
Your ideas to develop the map are welcome. Feel free to post them into the comments section.

The map was made in 14w27b and does not work with 1.7.X!!!

Things to add in the future:

• Lights for pedestrian crossings
  
• More buildings to look more city-like
  
• An alternative method for measuring time (to reduce lag caused by redstone)