The operators of three major bike-sharing apps have pledged to make their services less accessible to children in response to Shanghai traffic and education authorities' calls for improved safety.

China's traffic law bars children under the age of 12 from riding bikes and tricycles on roads, yet a rapid rise in the popularity of shared bikes in cities nationwide has resulted in more young people breaking that law.

After meeting with Shanghai officials on Saturday, operators of Mobike, Ofo and Bluegogo promised to revamp equipment and security procedures to block underage users from accessing their bikes.