Missoula’s downtown area is going to be going through some major changes over the next few years. Safer Crossing Planned for Orange StreetWhen this traffic signal project was announced, I was curious how it was going to affect the traffic heading north on Orange Street into the downtown area. We now know a bit more about some of the traffic signal changes that will be taking place downtown. One of the improvements being discussed is upgrading the existing traffic signals to ATSPM, which stands for Automated Traffic Signal Performance Measures. READ MORE: Surveyors Working In Missoula’s Downtown AreaFor example, signals can detect if a vehicle runs a red light.