Did this visa run myself yesterday and clocked 384 kilometers round trip from Bangyai ( west Bangkok / Nonthaburi )
Easy drive following the road from Kanchanaburi towards the three pagodas pass. turning left about 15k from town down the 3229 to Ban Gao. From here it is signposted all the way to the border on good tarmac all the way except for the bridge already mentioned by jons 557.
When you get to Thai immigration it looks like this :
Get stamped out and head the 5 kilometers to the Burmes immigration post. Too far to walk ( as an Aussie biker I met found out after walking part of the way before being given a lift by kindly Thais ) so the easiest option is motorcycle taxi, 120 baht for the return trip. The immigration guy told me it is possible to drive your own car but a bit of a hassle as it is liable to be searched which will hold you up. He also told me that the Burmese would want 700 baht for their visa
There is a temple here and a couple of food stalls so a good place to deposit the wife whilst I was doing the business
The long ride beteeen the two checkpoints looks like this :
after this, the road was dirt the last 800 metres to the Burmese immigration office. I missed a 100 meter section where there are two barriers checking out vehicles for contraband
When you get there this hut passes for immigration
As I was not in a group there was no waiting. They took my picture then gave me a dinky little entry permit in the former of a little booklet. I was a bit lucky here. The head honcho asked for 10 dollars visa fee which I did not have. He then did a quick conversion and asked for 320 baht instead . No haggling necessary .
As I was leaving the Aussie guy came in. He had no problem hitching a lift back to Thailand where he had left his bike.
A couple of shots from the porch of the hut with my motorcycle taxi waiting for me
The dirt road leading back to Thailand
Back in Thailand got my 90 days entry stamp in this hut
Done and dusted. Cheapest and quickest visa run I've ever done. Total time taken from Bangkok about 6 hours and total cost including fuel 1620 baht.
This place is obviously going to become the new mecca for Bangkoks visa runners. But when Singhorn opens ( soon ) you will have a choice of combining it with a beach break.
The motorcycle taxi guy said he had already driven down to the Andaman sea on the Burmese side and it took him about ten hours as the roads are still being worked on. Also told me that the mountains further on were higher further on and very scenic. A trip for the future