You can get these long distance busses from here ,
60 Colombo -Deniyaya/Akuressa/Urubokka/Deiyandara
32 Colombo -
Kataragama/Tangalle/Hambantota/Lunugamwehera/Angunakolapelessa/Middeniya
42 Colombo Morawaka/Neluwa /Deniyaya/Udugama
26 Colombo -Hakmana/Walasmulla/Middeniya/Deiyandara
02 Colombo -Matara/Galle/Ambalangoda/Yatiyana/Urubokka/Akuressa
64 Galle Hatton/Balangoda
02/420 Galle Padiyapelella
35/87 Tangalle Jaffna / Mullaitivu
Can acess to many buses but no any place to seat
There is no proper waiting place to stay
Ajith