Chachoengsao, Paet Rio, has an old history back to the reign of King Borommatrailokkanat in the Ayutthaya period. Most of the people have settled by the Bang Pakong River and along canals. "Luangpho Phuttha Sothon" is a centre of faith of the people of Paet Rio. In the past, Chachoengsao was a fourth class city under the Ministry of Defence. During the reign of King Rama I, it was attached to the Ministry of Interior. Until the reign of King Rama V who changed the administration system, Chachoengsao became a city in the Prachin Buri Circle. In 1916, its status was changed from a city to a province. "Chacheongsao" is a Khmer word which means a deep canal. The name "Paet Rio" comes from the story that the city once teemed with giant snake-head fish; up to 8 cuts were required on the sides in making sun-dried fish.
From Bangkok, there are three routes:-
Take Highway 304 (Bangkok – Min Buri – Chachoengsao), a total distance of 75 km.
Take Highway 34 (Bang Na – Trat Road) and change to Highway 314 (Bang Pakong – Chachoengsao), a total distance of 90 km.
Take Highway 3 (past Samut Prakan and Bang Pakong) and change to Highway 314, a total distance of 100 km.
There is an air-conditioned bus service from the Northern Bus Terminal on Kamphaeng Phet II Road during 5.20 a.m. – 6.00 p.m. The bus leaves every 30 minutes. The travel takes about one hour and 20 minutes, using the Motorway. For more information, contact the Chachoengsao Transport Company Limited (Kamphaeng Phet II Road) at Tel. 0 2936 4041, 08 9748 1349, or the Northern Bus Terminal (Kamphaeng Phet II Road) at Tel. 0 2936 2852 – 66 ext. 311, 442.
Additionally, visitors can travel from the Eastern Bus Terminal (Ekkamai). There is a bus service during 5.00 a.m. – 9.30 p.m. For further details, contact the Chachoengsao Transport Company Limited (Ekkamai) at Tel. 0 2712 1018, 08 9749 1336, the Eastern Bus Terminal (Ekkamai) at Tel. 0 2391 2504, the Chachoengsao Transport Company Limited (Chachoengsao) at Tel. 08 9752 9200, or the Chachoengsao Bus Terminal at Tel. 0 3851 4482.
A train service is available from the Hua Lamphong Railway Station to Chachoengsao. There are 11 trains a day. The first train departs at 5.55 a.m. and the last train leaves at 6.25 p.m. For more information, call Tel. 1690, 0 2220 4334, or contact the Chachoengsao Railway Station at Tel. 0 3851 1007, or visit the website: www.railway.co.th.