BEIJING, March 31-- Chinese police have warned travellers to be mindful of traffic safety during the upcoming Qingming holiday, also known as Tomb Sweeping Day.

Traffic is expected to increase as people visit relatives' gravesites or enjoy a spring outing during the holiday, which falls on Sunday this year, the traffic management bureau under the Ministry of Public Security said in an official statement.

They warned of traffic risks based on previous holiday data, which includes possible accidents on dangerous mountain roads, expressways and around major cities.

According to previous statistics, accidents caused by negligence and dangerous driving may also increase during the holiday, the document said.

It also warned of possible rain and dust in different regions, which could affect local traffic.