People shroud their children and themselves in jackets and masks while passing through Nguyen Xien Street.
Ring Road 3, to run over 90 km and cost more than VND75.3 trillion (US$3.2 billion), will pass through Ho Chi Minh City, the former Binh Duong Province (which has merged with HCMC), Dong Nai Province, and the former Long An Province, now merged with Tay Ninh.
Its 15.3-kilometer section in Binh Duong has been completed.
The remaining 76 kilometers are under construction with a completion deadline of June next year.
It is expected to be a key development corridor for urban and industrial growth in the region.