In this file photograph dated April 30, 2016, Cambodian passengers board a train at the Phnom Penh train station as railway service resumes after years of suspension. (TANG CHHIN SOTHY / AFP)

PHNOM PENH — Cambodia has planned to upgrade its existing northern Phnom Penh-Poipet railway to become the kingdom's first high-speed rail, which is expected to cost more than 4 billion US dollars, the Ministry of Public Works and Transport said in a news release on Tuesday.

The China Road and Bridge Corporation (CRBC) presented its feasibility study's preliminary results on the upgrading of the Phnom Penh-Poipet railway to the ministry on Monday, the news release said.

This high-speed rail will have a width of 1.43 meters, with the speed of 160 km per hour, it said, adding that there will be a total of 33 stations and more than 300 overpasses along the route

Poipet is a bustling city that shares its border with Thailand.

READ MORE: Train to Thai border from Phnom Penh after 45 years

"The preliminary results showed that the 382-km rail line requires an investment capital of more than 4 billion US dollars, including electric locomotives and carriages, and the construction will take about four years to complete," the news release said.

This high-speed rail will have a width of 1.43 meters, with the speed of 160 km per hour, it said, adding that there will be a total of 33 stations and more than 300 overpasses along the route.

Minister of Public Works and Transport Sun Chanthol said construction work on the project is expected to commence in the near future.

"The northern Phnom Penh-Poipet high-speed rail will importantly serve transportation and promote socioeconomic growth, especially in the provinces and cities along the rail," he said.

READ MORE: Cambodia emphasizes need to enhance ASEAN connectivity

The high-speed rail will be mainly focused on passenger and freight services between Cambodia and Thailand as well as other countries in the Association of Southeast Asian Nations (ASEAN), the news release said.

Cambodia currently has two lines of railroads. They are a 382-km northern line linking Phnom Penh and Poipet city, and a 266-km southern line connecting Phnom Penh and the international seaport province of Preah Sihanouk.

The two lines, which had been built between 1929 and 1969, were damaged during decades of civil war and trains currently can run on the tracks at the speed of 30 to 40 km per hour only.