According to Moscow's traffic police department, a total of 4,200 car accidents were registered on Saturday and Sunday in the capital, in which four people were killed and 78 injured.
In the Moscow Region over the same period, 20 people were killed and 86 injured in about 2,000 traffic accidents.
"All major deadly accidents on Saturday were caused by severe traffic violations," said Svetlana Landa, a spokeswoman for the Moscow Region's traffic police department.
Almost two-thirds of the accidents occurred on Saturday, including eight-car pileup on the Kievskoye highway southwest of Moscow in which six people, including three children, were injured. Later in the day, a collision between a bus and a minibus killed four people on the same road.
Five people were killed when a Kamaz truck lost control and rammed four cars west of Moscow.
The number of traffic code violations registered in Moscow and the Moscow Region stood at 12,500.