You could make a timer from a big capacitor charging from a high value resistor and a Fet or Darlington sensing its output voltage.
Then instead of using an inexpensive counter IC you can make your own from about 30 transistors.
Adjust the RC combos to control the red/green light delays, replace the LEDs with DPDT relays to control two sets of red/green lights at an intersection. Wire the relays so green on one light means red on the other.