LPG Gas station in Sukhumvit Road, near Ban Bueng, before to the Motorway from Chanthaburi.
The LPG gas price is 11.45, to it is cheaper than Chanthaburi, normally LPG price in Chanthaburi is between 11.80 to 11.99.
They build hotel there, could have rest before go to Motorway. The toilet there is clean and they will be some food to serve soon.
Here is the location map.