motorway construction works. a 99 2. ba traffic safety main construction measure. - traffic safety of longer duration with three main construction phases and six longer lasting sub-phases as well as traffic safety of shorter duration on the motorway. - traffic safety of shorter and longer duration on the subordinate road and path network. - maintain and operate a mobile congestion warning system (5 led panels and 2 mq). 70 traffic safety devices of shorter duration during the day, 50 traffic safety devices of shorter duration at night, make 170 pieces of small signage, make 27 pieces of large signage, 140 pieces of beacons without warning light, 1,080 markers with warning light, 3,150 running meters of yellow marking (foil and paint) 30cm, 49,300 linear meters of yellow marking (foil and paint) 15 cm, provide 6,400 m of transportable protective equipment t3/w2 at peak times, provide 870 m of transportable protective equipment h1/w7 at peak times, maintain and operate 4 construction site cameras.