Browsing by Author "Lee, Dahye"
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- Connected Vehicle Information for Improving Safety Related to Unknown or Inadequate Truck ParkingKatsikides, Nicole; Gick, Brittney N.; Parab, Smruti; Hwang, William "Billy"; Lee, Dahye; Montes de Oca, Jose Rivera; Farzaneh, Reza; Kong, Xiaoqiang "Jack"; Srisan, Tat; Bell, Stephen; Alden, Andy S.; Warner, Jeff; Schrank, David (Safe-D National UTC, 2022-10)Safety issues due to commercial truck parking shortages are a national concern. National hours-of-service (HOS) regulations limit drivers’ time on the road to increase safety by limiting fatigue. This requires drivers to locate safe, secure, and legal parking wherever they are when or before they hit their limits. If drive time is exhausted with no nearby truck parking, drivers may park in unsafe or unauthorized locations to meet HOS requirements, or they may continue to drive while fatigued. As a result, there are intrinsic safety implications to all highway users due to large trucks parking in unsafe locations or truck drivers driving past their allotted hours. With the projected growth of truck traffic, the demand for adequate truck parking will continue to outpace the supply of public and private parking facilities. The current study will help transportation agencies develop solutions to the parking availability problem by identifying effective methods for using data to estimate truck parking demand and areas of parking opportunity, assessing available data sources for estimating truck parking demand and supply, and determining the safest solutions for distributing information on parking availability directly to drivers.
- Identification of Railroad Requirements for the Future Automated and Connected Vehicle (AV/CV) EnvironmentMorgan, Curtis A.; Warner, Jeffery E.; Lee, Dahye; Florence, David (SAFE-D: Safety Through Disruption National University Transportation Center, 2020-06)The Federal Rail Administration (FRA) Highway-Rail Grade Crossing Inventory database from 2019 states that there are approximately 127,000 public, at-grade highway-rail grade crossings in the U.S. Despite this large number of direct intersections between the public highway and largely private rail systems, little current intelligent transport systems automated/connected vehicle (AV/CV) research is focused on how to incorporate the railroad system and its operations effectively into future roadway AV/CV system planning. This initial scanning project examined how transportation agencies, engineering firms, researchers, and other highway system stakeholders designing future AV/CV systems could best consider freight and passenger railroad operational and infrastructure needs in the development of future AV/CV system architecture. The project explored the following: •Information/data requirements for roadway vehicles to operate effectively near rail crossings. •Impediments to collecting and exchanging rail operations data between public roadway agencies, publiccommuter/transit rail systems, and the largely private freight rail operators. •Potential AV/CV implementation approaches near rail system assets that could benefit both systems. •Critical, necessary additional research efforts in both the short- and long-term to address future jointrailroad/highway AV/CV architecture challenges.