Each year at least 300 traffic accidents occur in connection to road work in Sweden in which people are injured or killed. The two types of accidents that are most common are rear-end collisions and accidents with vulnerable road users. About 95% of all persons that are killed or injured in traffic accidents in connection to road work are road users, not road workers. The most common type of accident when a road worker gets injured in a traffic accident is during winter maintenance related work. In 4% of the accident a protection barrier or vehicle with a TMA (Truck Mounted Attenuator) was involved. Barriers and TMA seem to be very efficient protection for both road workers and ordinary road users. This paper aims to give a comprehensive understanding of traffic accidents that occur in connection to the many various types of roadwork, all year round, in one entire country.