Macroscopic modeling considers traffic flow as a continuous fluid, mesoscopic modeling considers traffic flow as a collection of individual vehicles, and microscopic modeling considers the behavior of individual drivers and vehicles.

Transportation planning models are used to predict future traffic demand, evaluate the impacts of transportation projects, and develop transportation policies and plans.

Traffic counts, travel surveys, and GPS data are all common data collection methods used in transportation planning.

Travel surveys are used to collect information about people's travel patterns, identify the origins and destinations of trips, and estimate the amount of traffic on a particular road or highway.

Cost-benefit analysis, multi-criteria analysis, and scenario planning are all common decision-making tools used in transportation planning.

Cost-benefit analysis is used to compare the costs and benefits of different transportation projects, identify the most cost-effective transportation project, and evaluate the economic impacts of a transportation project.

Multi-criteria analysis is used to consider multiple criteria in the decision-making process, identify the best transportation project for a particular community, and evaluate the social and environmental impacts of a transportation project.

Scenario planning is used to explore different possible futures and their implications for transportation, identify potential risks and opportunities associated with different transportation projects, and develop strategies for adapting to future changes in transportation.

Adaptive traffic signal control, coordinated traffic signal control, and traffic actuated signal control are all common technologies used for traffic signal control.

Adaptive traffic signal control is used to adjust the timing of traffic signals in response to real-time traffic conditions, improve traffic flow and reduce congestion, and reduce vehicle emissions and improve air quality.

Coordinated traffic signal control is used to coordinate the timing of traffic signals at multiple intersections, improve traffic flow and reduce congestion, and reduce vehicle emissions and improve air quality.

Traffic actuated signal control is used to adjust the timing of traffic signals in response to the presence of vehicles, improve traffic flow and reduce congestion, and reduce vehicle emissions and improve air quality.

Transit network modeling, transit scheduling, and transit fare analysis are all common technologies used for public transportation planning.

Transit network modeling is used to simulate the operation of a public transportation network, evaluate the impacts of changes to the public transportation network, and develop strategies for improving the efficiency and effectiveness of the public transportation network.

Transit scheduling is used to determine the frequency and timing of public transportation service, ensure that public transportation service is reliable and efficient, and minimize the cost of providing public transportation service.

Transit fare analysis is used to determine the appropriate fare structure for a public transportation system, estimate the revenue that will be generated by a public transportation system, and evaluate the impacts of changes to the fare structure on ridership and revenue.