- Management, operation and maintenance of Hai Van tunnel, bridges and roads.

- Management, exploitation, restoration and maintenance of delegated national highways. 

- Construction of civil and industrial works.

- Transport services.

- 1974: Hai Van Tunnel Management and Operation Joint Stock Company, formerly known as Thong Nhat Workshop, was established.

- 1975: Renamed as Thong Nhat Automobile Repair Factory;

- 1992: Renamed as Transport Construction and Mechanicals Factory No.5;

- 1995: Renamed as Transport Construction and Mechanicals Company No.5;

- 2005: Renamed as Hai Van Tunnel Management and Operation Company;

- 2009: Renamed as Hai Van Tunnel Management and Operation Sole Proprietorship Company;

- 2013: Equitized with the initial charter capital of VND31.6 billion;

- 18 December 2015: Traded on the UPCOM market;

- July 30, 2019: Renamed as Deo Ca Traffic Infrastructure Investment Joint Stock Company;

- September 09, 2020: Decreased charter capital to VND2,673.84 billion.

- May 25, 2021: Listed on Ho Chi Minh Stock Exchange (HOSE);