National Highways Authority Of India [NHAI] — krishnagiri tollbooth in tamil nadu don't follow rules

Krishnagiri tollbooth in tamil nadu don't follow rules. Always there is a huge traffic jam due to which we need to wait minimum 20 mins. I experienced a traffic jam for more than 2km while coming from salem. Last time i was waiting for 30 mins. I know if there is more vehicles than yellow line they should open the gates. That is never followed. One vehicle comes out in few minutes at krishnagiri tollbooth. Where as most tollbooth it's around 30 seconds