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Gregory D. Erhardt
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Year
Do transportation network companies decrease or increase congestion?
GD Erhardt, S Roy, D Cooper, B Sana, M Chen, J Castiglione
Science Advances 5 (5), eaau2670, 2019
4682019
Understanding the Recent Transit Ridership Decline in Major US Cities: Service Cuts or Emerging Modes?
M Graehler Jr, RA Mucci, GD Erhardt
Transportation Research Board 98th Annual MeetingTransportation Research Board, 2019
2422019
Do transportation network companies increase or decrease transit ridership? Empirical evidence from San Francisco
GD Erhardt, RA Mucci, D Cooper, B Sana, M Chen, J Castiglione
Transportation 49 (2), 313-342, 2022
832022
Why has public transit ridership declined in the United States?
GD Erhardt, JM Hoque, V Goyal, S Berrebi, C Brakewood, KE Watkins
Transportation Research Part A: Policy and Practice 161, 68-87, 2022
632022
NCHRP Synthesis 406: Advanced Practices in Travel Forecasting
R Donnelly, GD Erhardt, R Moeckel, WA Davidson
Washington, DC, 2010
57*2010
The impacts of shared e-scooters on bus ridership
A Ziedan, W Darling, C Brakewood, G Erhardt, K Watkins
Transportation research part A: policy and practice 153, 20-34, 2021
452021
Ohio long-distance travel model
GD Erhardt, J Freedman, A Stryker, H Fujioka, R Anderson
Transportation Research Record: Journal of the Transportation Research Board …, 2007
412007
Why is traffic congestion getting worse? A decomposition of the contributors to growing congestion in San Francisco-Determining the Role of TNCs
S Roy, D Cooper, A Mucci, B Sana, M Chen, J Castiglione, GD Erhardt
Case Studies on Transport Policy 8 (4), 1371-1382, 2020
352020
TNCs & Congestion
J Castiglione, D Cooper, B Sana, D Tischler, T Chang, GD Erhardt, S Roy, ...
342018
Estimating the uncertainty of traffic forecasts from their historical accuracy
JM Hoque, GD Erhardt, D Schmitt, M Chen, M Wachs
Transportation Research Part A: Policy and Practice 147, 339-349, 2021
242021
The changing accuracy of traffic forecasts
JM Hoque, GD Erhardt, D Schmitt, M Chen, A Chaudhary, M Wachs, ...
Transportation 49 (2), 445-466, 2022
202022
Evaluating the Ability of Transit Direct Ridership Models to Forecast Medium-Term Ridership Changes: Evidence from San Francisco
RA Mucci, GD Erhardt
Transportation Research Record 2672 (46), 21-30, 2018
202018
Evaluating Regional Pricing Strategies in San Francisco--Application of the SFCTA Activity-Based Regional Pricing Model
E Sall, E Bent, J Koehler, B Charlton, GD Erhardt
Transportation Research Board 89th Annual Meeting, 2010
182010
Modeling the choice to use toll and high-occupancy vehicle facilities
G Erhardt, F Koppelman, J Freedman, W Davidson, A Mullins
Transportation Research Record: Journal of the Transportation Research Board …, 2003
182003
Recent Decline in Public Transportation Ridership: Analysis, Causes, and Responses
K Watkins, S Berrebi, G Erhardt, J Hoque, V Goyal, C Brakewood, ...
TCRP Research Report, 2021
172021
A big data mashing tool for measuring transit system performance
GD Erhardt, O Lock, E Arcaute, M Batty
Seeing cities through big data: Research, methods and applications in urban …, 2017
172017
MTC’s Travel Model One: Applications of an Activity-Based Model in its First Year
G Erhardt, D Ory, A Sarvepalli, J Freedman, J Hood, B Stabler
5th Transportation Research Board Innovations in Travel Modeling Conference …, 2012
162012
Evaluating the biases and sample size implications of multi-day GPS-enabled household travel surveys
GD Erhardt, L Rizzo
Transportation Research Procedia 32, 279-290, 2018
132018
Enhancement and application of an activity-based travel model for congestion pricing
GD Erhardt, B Charlton, J Freedman, J Castiglione, M Bradley
Transportation Research Board Innovations in Travel Modeling Conference …, 2008
132008
Fusion of Large Continuously Collected Data Sources: Understanding Travel Demand Trends and Measuring Transport Project Impacts
GD Erhardt
UCL (University College London), 2016
92016
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Articles 1–20