Publications

2010
F. Wang, Machemehl, R. B., and Popova, E., “Toward monte carlo simulation-based mechanistic-empirical prediction of asphalt pavement performance,” Journal of Transportation Engineering, vol. 136, pp. 678–688, 2010.Abstract
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2009
K. Torrance, Sener, I. N., Machemehl, R. B., Bhat, C. R., Hallett, I., Eluru, N., Hlavacek, I., and Karl, A., “The effects of on-street parking on cyclist route choice and the operational behavior of cyclists and motorists. Report No.FHWA/TX-09/0-5755-1,” 2009. Publisher's VersionAbstract
Because of the serious societal, environmental, economic, and public health problems associated with motorized transportation, there is increased interest in encouraging non-motorized modes of travel. The current study contributes toward this objective in two ways. First, it evaluates the operational impacts of bicycling adjacent to on-street parking. Second, it identifies the importance of attributes influencing bicyclists’ route choice preferences. The importance of evaluating both operations and individual preferences at the same time is the interrelationship between the two; poorly designed roadways may encourage cyclists to leave designated bicycle routes. Operationally, this study examines field data that was collected in Austin, Houston, and San Antonio and resulted in over 6,400 observations of motorists and/or cyclists adjacent to on-street parking. From the data, multivariate regression models were developed to predict the motorist’s and cyclist’s position on the roadway and the probability of motor vehicle encroachment. The models indicate that on-street parking has a significant impact on motorist and cyclist position; a bike lane combined with a buffer space is the only way to completely remove cyclists from the door zone, and operationally, a bicycle lane is more effective than a wide outside lane. As a result of the study, the Texas Guide for Planned and Retrofit Bike Facilities was updated to include on-street parking. In evaluating route choice, the study specifically examines a comprehensive set of attributes that influence bicycle route choice, including: (1) bicyclists’ characteristics, (2) on-street parking, (3) bicycle facility type and amenities, (4) roadway physical characteristics, (5) roadway functional characteristics, and (6) roadway operational characteristics. The data used in the analysis is drawn from a web-based stated preference survey of Texas bicyclists. The results of the study emphasize the importance of a comprehensive evaluation of both route-related attributes and bicyclists’ demographics in bicycle route choice decisions. The empirical models indicate that travel time is the most important attribute for commuters in choosing their routes. These factors also impact bicyclists’ route choice: traffic volume; speed limit; on-street parking characteristics; bicycle route continuity; number of stop signs, red lights, and cross streets; and roadway terrain. 
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A. R. Tsyganov and Machemehl, R. B., “Driver Responses at Different Information Loads on Urban Freeways”. 2009.Abstract
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T. A. Barrow, McCray, T., Gonzalez, R., Candelaria, L., Gamez, M., Byrd, C., Washington-Weik, N., Falola, T., Cowley, C., Armendariz, E., and others,An examination of urban public transportation equity in San Antonio, Texas,” University of Texas, 2009.Abstract
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R. B. Machemehl, Cheu, R. L., and Liu, H., “Guidelines for Incorporating a Bus Rapid Transit Scenario into the Analysis of Texas Highway Corridors”. 2009.Abstract
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A. R. Haire, Machemehl, R. B., and Mills, A. F., “Operational Cost Efficiency of Bus versus Heavy Rail: A Temporal and Regional Analysis,” 2009.Abstract
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K. B. Torrance, Haire, A. R., and Machemehl, R. B., “Vehicle and Driver Scheduling for Public Transit”. Southwest Region University Transportation Center, Center for Transportation Research, University of Texas at Austin, 2009.Abstract
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L. D. Galicia, Cheu, R. L., Machemehl, R. B., and Liu, H., “Bus rapid transit features and deployment phases for US cities,” Journal of Public Transportation, vol. 12, pp. 23–28, 2009.Abstract
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W. (D. ) Fan and Machemehl, R. B., “Do Transit Users Just Wait for Buses or Wait with Strategies?,” Transportation Research Record: Journal of the Transportation Research Board, vol. 2111, pp. 169–176, 2009.Abstract
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A. R. Tsyganov, Machemehl, R. B., and Warrenchuk, N., “Driver Performance and Safety Effects of Edge Lines on Rural Two-Lane Highways”. 2009.Abstract
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2008
W. Fan and Machemehl, R. B., “Tabu search strategies for the public transportation network optimizations with variable transit demand,” Computer-Aided Civil and Infrastructure Engineering, vol. 23, pp. 502–520, 2008.Abstract
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W. (D. ) Fan, Machemehl, R. B., and Lownes, N. E., “Carsharing: Dynamic decision-making problem for vehicle allocation,” Transportation Research Record: Journal of the Transportation Research Board, vol. 2063, pp. 97–104, 2008.Abstract
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N. E. Lownes and Machemehl, R. B., “Commuter rail circulator route network design and its implications for transit accessibility,” Transportation Research Record: Journal of the Transportation Research Board, vol. 2042, pp. 90–97, 2008.Abstract
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F. Wang and Machemehl, R. B., “Monte Carlo Simulation Approach to Mechanistic-Empirical Analysis of Flexible Pavement”. 2008.Abstract
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W. Fan and Machemehl, R. B., “A tabu search based heuristic method for the transit route network design problem,” in Computer-aided Systems in Public Transport, Springer, 2008, pp. 387–408.Abstract
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