Research Projects

Induced Demand at Airports trending idea Edited

This research will study the concept of 'induced demand' for general aviation airports and provide a comprehensive guidance of this phenomenon, specifically for airports.

Background (Describe the current situation or problem in the industry, and how your idea would address it.)

Transportation roadway planners know that induced traffic occurs when new vehicle trips are generated usually because of shifts from other modes or shifts from other times of the day. On an airport roadway system, this can occur when people choose to travel by private vehicles instead of using high occupancy mode of transportation (e.g. transit, carpool, shuttles). This research will study the impact of airport landside projects to understand if and how improvements made to the airport transportation infrastructures (for example adding or freeing up capacity) is able to encourage more people to use private vehicles, failing to decrease congestion. Concurrently, this research will go further and study also the induced demand from the passenger perspective and will answer questions about if and how improvements made to any parts of the airport (including terminal and airside) can generate additional passenger trips.

Objective (What is the desired product or result that will help the airport industry?)

This project will provide a summary of the current state of practice on induced demand, evidence of (or lack of) the existence of this phenomenon for airports, and a guide with countermeasures to control it. The focus of this research will be on landside (where more data is available) and on the demand "generated" by capacity improvements projects.

As part of this project, a tool-based evaluation framework will be developed to quantify induced demand by leveraging a policy evaluation tool in combination with a travel demand and/or micro-simulation framework This framework will be able to iterate through the mode choice decision and driving behavior (e.g. route choice), and evaluate the induced demand of different scenarios. 

The information presented in this research can be of interest to airport managers, leaders and decision makers, in addition to transportation planning professionals and researchers. This study will be important in relation to any traffic and mode share modeling and to understand the correlations between demand and congestion pricing (including landside access fees).

Approach (Describe in general terms the steps you think are needed to achieve the objective.)

The approach include the following general steps:

1. Conduct a literature review

2. Provide evidence (or lack of it) of the existence of induced demand for landside, terminal and airside - Focus on landside

3. Create a guide identifying possible countermeasures

4. Develop and evaluation tool

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Idea No. 803