Specifications include, but are not limited to:The Virginia Department of Transportation Northwest Region Operations (NWRO) is seeking expressions of interest from teams of consulting engineering firms who wish to be considered to provide professional engineering services for the utilization of professional traffic engineering expertise to analyze traffic flow in congested or crash prone areas and to make recommendations to solve traffic operational problems and/or to improve traffic flow. The analysis should be based on State and Federal policies and regulations, guidelines in the Traffic Operations and Safety Analysis Manual, and accepted engineering principles and practices. The analysis should employ, as necessary, up-to-date traffic engineering tools, such as computer simulation models with software tools such as Synchro/SimTraffic, Sidra, VISSIM, Transmodler, Corsim, HCS, etc. to complete this work. The analysis may require extensive traffic data collection, including but not limited to speed, volume, classification, turning movements, travel time, pedestrian counts, bicycle counts, delay, etc. The traffic data collection may be required on freeways where invasive data collection methods are inappropriate. If unit (rather than hourly) prices for traffic counts are given, then non-invasive count methods should be included in the pricing. Expertise in Mesoscopic software e.g. AIMSUN is also desirable to be able to model large area networks.