From 31st Dec 2016, 37 additional nations were granted 30-day visa exemption, instead of 15 days, when entering Thailand via a land border.
As the Kingdom of Thailand ruled that only two entries are allowed for land border crossings per year news came through that certain countries will be entitled to visa exemptions
In addition to passport holders of Canada, France, Germany, Hong Kong, Italy, Japan, Laos, Macao, Mongolia, Russia, UK and USA – who are granted 30 days visa exemption arriving by both land and air – now the following 37 nation also qualify for 30 days at land borders to match arrival at airports.
Australia
Austria
Belgium
Bahrain
Brunei
Czech Republic
Denmark
Estonia
Finland
Greece
Hungary
Iceland
Indonesia
Ireland
Israel
Kuwait
Liechtenstein
Luxembourg
Malaysia
Monaco
Netherlands
New Zealand
Norway
Oman
Philippines
Poland
Portugal
Qatar
Singapore
Slovakia
Slovenia
Spain
South Africa
Sweden
Switzerland
Turkey
As mentioned above, arrival by air for visitors from the 37 nations remains unchanged at 30 days.
Source: Stickboy Bangkok