S.R. Gehrke, C.D. Phair, B.J. Russo, & E.J. Smaglik. (2023). Observed sidewalk autonomous delivery robot interactions with pedestrians and bicyclists. Transportation Research Interdisciplinary Perspectives 18: 100789. 
Future Automobility
Research on motorized mobility options such as ridehailing, electric vehicles, and automated vehicles.
Journals
S.R. Gehrke, & M.P. Huff. (2022). Spatial equity implications and neighborhood indicators of ridehailing trip frequency and vehicle miles traveled in the Phoenix metro region. Transportation.
S.R. Gehrke, M.P. Huff, & T.G. Reardon. (2021). Social and trip-level predictors of pooled ride-hailing service adoption in the Greater Boston Region. Case Studies on Transport Policy.
S.R. Gehrke, & T.G. Reardon. (2021). Patterns and predictors of early electric vehicle adoption in Massachusetts. International Journal of Sustainable Transportation.
S.R. Gehrke. (2020). Uber service area expansion in three major American cities. Journal of Transport Geography 86: 102752.
S.R. Gehrke, A. Felix, & T.G. Reardon. (2019). The substitution of ride-hailing services for more sustainable travel options in the Greater Boston Region. Transportation Research Record: Journal of the Transportation Research Board 2673(1): 438-446.