Chasing game

hello friends ,
I am trying to develop a game where our car(yellow) is chased by enemy car(green) , if enemy car catches us , game over but i am unable to figure out ,how i can make it feasible to make enemy car to catch us.
One way i think to make it possible is that i have implemented the bezier tween throughout the track, pause the tween if enemy Car hits our car for 2-3 seconds , game over if time exceeds & no car movement is detected from player side, but how can i get the player car position at any instant of time?
but If i get it by any means , the tween of the enemy start from begining every time the coordinate of car position is passed onto enemy Tween function
Please guide me
i have attached the required files