Applicants for driving licences have to sit longer hours for the theory tests starting Wednesday as part of a Land Transport Department plan to improve road safety.
The department started requiring people seeking new licences or renewing those expiring more than one year to take two more tests from Wednesday.
One of the new exams involves first-aid knowledge and skills to deal with emergencies. The other focuses on laws related to driving, including the land transport and highways acts.
Exam-takers are given five hours to do all the tests, up from four hours before the new theory tests were added.
Department director-general Sanit Promwong said the new curriculum is part of the 'Sure driving, smart driver' campaign to ensure drivers have better skills and hopefully reduce the number of road accidents in the country.
The last time the department changed the rules was in 2015, when applicants were required to sit a new multiple-choice test with more questions and they had to get 90% correct to pass, up from 75% previously.