As per clause 6 of the Vehicle and Transportation Act, 2049 and Rule 18 of the Vehicle and Transportation Rule,2054, the vehicle standard has been categorized as :

1. Direct service

a. Night bus

b. Deluxe bus

c. Super Deluxe bus

2. Express Bus Service

​​​​​​​ a. Deluxe bus

​​​​​​​ b. Super Deluxe bus

​​​​​​​

3. Local

4. Mini bus

​​​​​​​5. Micro bus