Northern Ninh Binh province has started the expansion of the Cao Bo-Mai Son Expressway, which is part of the eastern North-South Expressway.

The 15.2-km expressway section will be expanded from four to six lanes.  

The section runs from Yen Bang Commune in Nam Dinh Province to Mai Son Commune in Ninh Binh Province. Its starting point connects with the Cau Gie – Ninh Binh Expressway and the ending point connects with the Mai Son – National Highway No.45.

Once upgraded, the expressway section will be more than 32m wide, allowing for a maximum speed of 100-120 kph.

The project has total investment capital of over VND1.87 trillion ($72.8 million), financed by the central budget.

Construction is expected for completion in 2026.

The project got approval from the Ministry of Transport last July.

The Cao Bo-Mai Son Expressway was put into service in 2022, with four restricted lanes across a width of 17 m.