Policy Papers

CMU’s Heinz College is an internationally recognized leader in data-driven public policy. Housed in the Heinz College, Traffic21 strives to be a leader of both innovative transportation technology and policy research to guide civic leaders in harnessing the power and managing the risks of intelligent transportation systems.  Traffic21 & CMU researchers periodically produce policy papers intended to inform transportation decision making.  These papers are generally informed by the research undertaken at Carnegie Mellon.

Below are such papers and transportation policy research publications from CMU faculty.


Image of Forbes AvenueSocietal Impacts of a Complete Street Project on the Forbes Avenue Mixed Urban Corridor

Complete streets facilitate multimodal travel by improving both transportation access and safety by emphasizing the user, not the automobile. Forbes Avenue, originally a 4-lane urban arterial (two lanes in each direction, with no dedicated bike lanes), was reduced to three lanes (one lane in each direction and a center turn lane) and two bike lanes. Policy assessment indicate that traffic volumes decreased by 11%–31%, bicycle counts increased by 160% and 280% during the peak AM and PM hours, respectively, and average PM2.5 concentrations were reduced from 9.1 μg=m3 to 7.6 μg=m3 when compared to preretrofit conditions. No crashes were reported by the Pennsylvania Department of Transportation in the five months following project completion. Results can help inform the decision-making process for transportation planners exploring complete street projects with similar community and roadway traffic characteristics. Paper at https://ascelibrary.org/doi/abs/10.1061/%28ASCE%29IS.1943-555X.0000609


Cover Page of ReportAccelerating Decarbonization of the U.S. Energy System

National Academies of Sciences, Engineering, and Medicine. 2021. Accelerating Decarbonization of the U.S. Energy System. Washington, DC: The National Academies Press. https://doi.org/10.17226/25932.

Committee Members Include:  Chris Hendrickson and Vivian Loftness







National Task Force on Connected Vehicles Paper Cover Page


Leading the Way: A National Task Force on Connected Vehicles
By: Jon M. Peha

Prepared for Day One Project, summer 2020







Screenshot of report front pageAre we there Yet, and Where is it we need to go?  Myths and Realities of Connected and Automated Vehicles
By Stan Caldwell and Chris Hendrickson

White Paper prepared for the University of Illinois at Chicago September 19, 2019 Urban Forum



Image of the 21st Century Trands in US Mobility Report


Recommended Policies for the 21st Century Trends in US Mobility
By Rick Grahn, Stan Caldwell and Chris Hendrickson










Which Alternative Fuel Technology is Best for Transit Buses? – Policymaker Guide







Which alternative fuel technology is best for transit buses? – Policy Brief









Connected and Autonomous Vehicles 2040 Vision FINAL REPORTAppendix

By Chris Hendrickson, Allen Biehler, Yeganeh Mashayekh