SHENZHEN - Traffic police in the southern Chinese city of Shenzhen signed an agreement with Didi Chuxing, the country's largest on-demand mobility (ODM) company, on Monday to ensure the safety of passengers.

According to the agreement, Didi will add a new function -- "share with traffic police" -- to its app. The function allows passengers to share their journeys with the city's traffic police.

Meanwhile, Didi Chuxing will support police investigations into traffic accidents.

Xia Xukun, with the city's traffic police bureau, said that Shenzhen traffic police will also cooperate with Didi and other companies to standardize the industry.

The cooperation between the two sides will cover the promotion of high-occupancy vehicle (HOV) lane to encourage car sharing and combat drunk driving, Xia said.

China unveiled its nationwide regulations for ODM services in July 2016, granting them legal status. Concerns have been raised over safety and market disorder.

The transport authorities in Beijing, Shanghai, Guangzhou and Shenzhen, the four most developed cities in China, separately issued strict regulations for ODM services in October 2016.