Yellow Bus is providing passennger bus service going to far east area of Thailand near the border with Kambodia. You can trip such as:
Mukdahan
Yasotorn
Roiet
Buriram
Satuk
Surin
Thier bus termnal is at Pattaya North Road, same place as Roong Reuang Coach going to Bangkok. The ticket couneter is also just same place as
Roong Reuang Coach.