Gridlock is a 3D simulation WebGL game unblocked. Become a new employee and you need to complete your job by controlling lights at intersections properly. To unlock the next level in Gridlock free online, you should avoid creating traffic jams. Not only that, you must manage cars carefully so they cannot collide with each other. If you play and protect everything successfully until the end of the stage, you will gain points. The score can prove your capability. Good luck!