First you activate Speed Limit law with hit T+I, then if you drive faster than 120 Km/h you will attended by one police with copbike, you should stop. then cop will walked over your car then you jailled for 11 seconds, then you relased from jail hehe, the speed limit automaticaly off when you get jailed

sorry for my bad english, this is english version of TILANG MOD (indonesia) by me too