American Traffic Solutions employees Jeff Brown, in bucket, and Rich Hood install red-light cameras and software around the intersection at 38th and Ocean Beach Highway on Friday.
ATS also will install red-light cameras where Ocean Beach Highway intersects with 15th Avenue and with NW Nichols Boulevard.
The Longview City Council agreed to try out the cameras in a pilot program that expires May 1, 2012.
The work at each intersection will involve installing equipment, foundations, poles and speed sensors and connecting the electronics to traffic signals and power.
The installation is expected to be finished by Dec. 31. On Jan. 1, the cameras will begin photographing the license plates of vehicles that enter the intersections after the light turns red. For the first 30 days, violators will receive a warning notice by mail. On Feb. 1, ATS will begin issuing $124 tickets, according to Longview officials.
After the red-light cameras are in place, speed cameras will be installed in the Mint Valley Elementary school zone on 38th Avenue and in the Columbia Valley Gardens Elementary school zone on 30th Avenue.