Is it legal or allowed by "authorities" for tourist buses to have police escorts?

last friday as i am on my way home, along SLEX, these two[SIZE="4"] AJU GLOBAL [/SIZE]tourist buses,with plate numbers [SIZE="4"]TYH 156 and TWP 830[/SIZE],with korean tourists, have 4 police motorcycle escorts with plate nos [SIZE="4"]SJ 7429, SE 7697[/SIZE], and two unidentified plates because they have black tint cover

It's very frustrating to see that these f****ng policemans acts like they are escorting VIP's and using blinkers and sirens to let other motorists go out of their way.

hope they find their match