The Oregon Department of Transportation and the Federal Highway Administration set the same guidelines throughout for state, local, federal and private contractors to follow.
By following the "Manual on Uniform Traffic Control Devices ", everyone who works on roads or within the roads right-of-way will be following the same guide lines. If everyone follows these guidelines, the motoring public will know what to expect no matter where they travel.
No one set of temporary traffic control devices can satisfy all conditions for a given project. When you are approaching one of our work zones usually the first thing you should expect is a "Road Work Ahead" sign. The motorist should start slowing down and use caution when they see this. The next sign should give some instruction as to what action to take such as "Be Prepared to Stop", "Left or Right Lanes End", etc. Next you will normally encounter a "Flagger Ahead", "Merge", or some other similar sign. If a "Flagger Ahead" sign is visible, you will next see a flagger with a stop/slow paddle to direct you around or through the actual work zone.
Driving through the work zone, one should use extreme caution. The work zone is a very busy place. There are workers, trucks and equipment in places that you may not suspect. It is very important to follow the flagger's instruction and drive slow and cautious. When leaving the work zone a flagger might possibly direct you back into your normal lane of travel. Keep an eye out for trucks and other traffic as you leave.
Please be patient. We may, as per Oregon Department of Transportation's Standard Specifications For Highway Construction Manual (1996) (Sub section 00220.02 Public Safety and Convenience), hold traffic up to twenty minutes at one time within a work zone. This is rare, but possible. We always try to keep traffic moving, so as not to disrupt the motoring public any longer than what is absolutely necessary. We do so only to maintain a safe condition for not only you the motoring public, but for our crews working within the work zone.
At times you will encounter workers doing quick projects such as, pothole patching, dead animal removal, trash pickup, etc. Normally they will have yellow caution warning lights on their trucks, and one worker directing traffic. When you see a truck with yellow lights on, slow down, use caution, and watch for directions. Always expect the unexpected in work zones.