Under light supervision, gathers, compiles and analyzes transportation demographic, economic, land use and/or environmental data including traffic counters, flow data, etc. to create basic to highly complexity modeling for existing and proposed transportation systems (roads; bridges; highways; tunnels; tolls; transit; rail; freight; aviation; bike/ped.; etc.). Reviews existing models and recommends improvements/changes as necessary. Leverages transportation systems, models, simulations and data to prepare basic to high complexity studies of existing or proposed transportation system including: new systems; upgrades or updates to existing systems; re-routing of systems; reviews of existing systems; etc. Creates transportation surveys, exhibits, and other meeting materials as necessary, to identify areas of public concern and facilitate public and stakeholder input. Prepares and designs traffic count and safety studies. Reviews proposed transportation project sites for alignment with draft designs and plans. Reviews transportation plans for compliance with applicable local, state and federal laws. Escalates any legal compliance issues as necessary. Collaborates with engineers to research, analyze or resolve complex transportation conceptual/schematic design issues. Performs other duties as required. Provides technical guidance and training to more junior staff. Mentors more junior staff and develops them for future growth within the discipline and firm.