Bus Travel in Tibet

Bus travel in Tibet is limited for foreign travelers are generally not allowed to use public transportation in the Tibet Autonomous Region except in Lhasa. All the trips out of Lhasa must be arranged through a travel agency. Even larger private bus drivers might be reluctant to take foreigners out of Lhasa because they don’t have government permission and/or insurance to take foreigners. Therefore, foreign tourists travelling places out of Lhasa must use a private vehicle with a driver.   
For local people and domestic travellers, coaches and buses are the most popular and convenient way to get out of Lhasa and transport to other parts of Tibet for being limited by the poorly developed public transport in Tibet. Most coaches or long-distance buses originate in Lhasa or Shigatse and run to any town that has a sizeable population. Smaller towns may have just one daily bus that runs to Lhasa in the morning and returns in the afternoon.
So far, there are 4 coach stations in Lhasa: Lhasa West Suburb Coach Station, Lhasa North Suburb Coach Station, Lhasa East Suburb Coach Station, and Lhasa Liuwu Coach Station. The coaches provide much convenience for locals and non-foreign travellers who plan to visit many different places of Tibet. However, there is no public bus to Everest Base Camp. You can get off of the bus in Baber (Baipa in Chinese) and then rent a vehicle to take you to EBC and then back to the main highway.
When taking a coach, you are probably asked to stow your baggage on the roof if you have a bulky backpack. In this case, make sure that it is tied down properly though bus drivers normally do a good job of checking such details. You'd better lock your pack as a precaution against theft. Besides, try to see what everyone else is paying for the fare before you hand over your cash. Sometimes, you can expect to spend a lot of time sitting around waiting for minibuses to fill up.