People have started travelling upcountry ahead of the Songkran holiday amid concerns over increases in road accidents outside of the so-called "seven dangerous days" of travelling.

The "seven dangerous days" of travelling on the road for this year's holiday finish on April 17.

The Royal Thai Police (RTP) had set a target of reducing road accidents by 5% during the seven dangerous days this year.

The RTP expects a 3.1% increase in people on the roads than last year's holiday, with the highest number of people travelling during the holiday expected to be on Friday and on Saturday for those leaving Bangkok and April 16-17 for those people returning.

Due to delays caused by traffic congestion, police also advised those using electric vehicles to find a charging station before their battery is nearly completely used up.

Some 60 deaths were reported on Wednesday, up from 30 deaths reported in the same period of last year. Of those, 50 were reported to be motorcycle deaths, with four of them being expats.

Some people have extended their holiday by taking leave until April 21, leading to an increased period of heavy road use in the country.