| Title | The Capability And Enhancement Of VDANL And TWOPAS For Analyzing Vehicle Performance On Upgrades And Downgrades Within IHSDM |
|---|---|
| Record ID | 9661 |
| Personal Name Creator |
Allen, R. Wade; Harwood, Douglas; Chrstos, Jeffery P.; Glauz, William D. |
| Corporate Contributor |
Systems Technology, Inc. |
| Publisher | Turner-Fairbank Highway Research Center |
| Publication Date | 20000121 |
| Language | English |
| Abstract | This report documents the results and recommendations for defining and analyzing "Vehicle Performance on Upgrades and Downgrades" on two lane rural roads. The contract objective was to develop functional requirements (and identify gaps) to enhance the capability of the Interactive Highway Safety Design Model (IHSDM) in evaluating vehicle operations on upgrades and downgrades, and to provide outputs useful for evaluating grade steepness and the location and design of climbing lanes and emergency escape ramps. The analysis procedures involve the use of two simulation programs: VDANL, a vehicle dynamics simulation; and TWOPAS, a traffic flow simulation. This report includes recommendations for the best approach for applying both VDANL and TWOPAS, the planned improvements to the programs, and data collection and research needed for software enhancement, calibration, verification and validation. Case studies of an example upgrade and downgrade are also included to help support the recommended enhancements. The report gives a reasonably comprehensive review of the current capabilities of VDANL and TWOPAS, and discusses relevant literature that might have some impact on future upgrades. 45 References, 25 figures, 13 tables, 5 appendices, 1 annex. 138 p. |
| Rosap ID | dot:14193 |
| Rosap URL | https://rosap.ntl.bts.gov/view/dot/14193 |
| TRT Terms | Highway design; Simulation; Traffic flow; Motor vehicle dynamics; Two lane highways; Road improvements; Road downgrades |
| General Subjects | Interactive Highway Safety Design Model (IHSDM); TWOPAS; Traffic flow simulation; VDANL; Vehicle dynamics simulation |
| Classification | NTL - HIGHWAY/ROAD TRANSPORTATION - HIGHWAY/ROAD TRANSPORTATION; NTL - HIGHWAY/ROAD TRANSPORTATION - Design; NTL - SAFETY AND SECURITY - Vehicle Design; NTL - OPERATIONS AND TRAFFIC CONTROLS - Traffic Flow |
| Geographical Coverage |
United States |
| TRIS Online Accession No |
00802555 |
| Report Number | FHWA-RD-00-078 |
| Resource type | Research Paper |
| URL | https://ntlrepository.blob.core.windows.net/lib/9000/9600/9661/VDANL_TWOPAS_00-078.pdf |
| Format | |
| Database | NTL Digital Repository |