The Department of Highways (DoH) will restrict the use of Motorway No 7 (Bangkok-Chon Buri-Pattaya-Map Ta Phut) and Motorway No 9 (Bang Pa-in-Bang Phli and Phra Phradaeng-Bang Khuntian Interchange) between 9pm and 4am until July 25, it said yesterday.
The restriction was put in place to comply with the government's order to restrict unnecessary travel during those hours to help curb the spread of Covid-19.
According to the announcement, the restrictions will also apply to other expressways operated by the Expressway Authority of Thailand (Exat).
The DoH said cargo trucks taking agricultural produce, fuel, medical supplies and equipment are exempt.
Motorists are advised to contact the DoH's 1568 hotline for further information.
Separately, Bangkok Airways is suspending services to five domestic destinations until the end of the month as new curbs on interprovincial travel from Bangkok and its surroundings come into effect.
The cancelled services are flights from Bangkok to Chiang Mai, Phuket, Sukhothai, Lampang and Trat.
Passengers whose bookings are affected won't be charged if they change their tickets, though refunds will only be offered in the form of flight vouchers which can be used on other dates, the airline said.
Such requests must be submitted at least 24 hours before the date listed on the ticket. The airline is urging passengers to check its website for further information.
Bangkok Airways operates services between Bangkok and Koh Samui, although services between Phuket and Koh Samui are expected to begin on July 16, with flights departing on Mondays, Wednesdays, Fridays and Sundays.
Meanwhile, the airline is expecting to launch services from Koh Samui to Singapore on Aug 1, with flights departing on Mondays, Thursdays and Sundays.