Ullman, G. L., Parma, K. D., Peoples, M. D., Trout, N. D., & Tallamraju, S. S. (1996). Visibility, Spacing, and Operation of Freeway Lane Control Signals (Report No. FHWA/TX-97/1498-3F). Texas Transportation Institute. Texas A&M University. https://rosap.ntl.bts.gov/view/dot/82906
Ullman, Gerald L., Kelly D. Parma, Melisa D. Peoples, Nada D. Trout, and Satya S. Tallamraju. Visibility, Spacing, and Operation of Freeway Lane Control Signals. Report no. FHWA/TX-97/1498-3F. Texas Transportation Institute. Texas A&M University, 1996. https://rosap.ntl.bts.gov/view/dot/82906.
Ullman, Gerald L., et al. Visibility, Spacing, and Operation of Freeway Lane Control Signals. Texas Transportation Institute. Texas A&M University, 1996, Report no. FHWA/TX-97/1498-3F, ROSA P. https://rosap.ntl.bts.gov/view/dot/82906.
This report summarizes the research performed and documented in interim project reports to address visibility, spacing, and operational issues pertaining to lane control signals (LCSs) used for freeway traffic management in Texas. Chapters in this final report review the results of legibility studies of new and used LCSs; a TxDOT expert panel meeting to address LCS visibility, spacing, and mounting location issues; and an evaluation of yellow diagonal and downward arrows for freeway traffic management purposes. The final chapter summarizes the findings and recommendations resulting from this research effort.
Ullman, G. L., Parma, K. D., Peoples, M. D., Trout, N. D., & Tallamraju, S. S. (1996). Visibility, Spacing, and Operation of Freeway Lane Control Signals (Report No. FHWA/TX-97/1498-3F). Texas Transportation Institute. Texas A&M University. https://rosap.ntl.bts.gov/view/dot/82906
Ullman, Gerald L., Kelly D. Parma, Melisa D. Peoples, Nada D. Trout, and Satya S. Tallamraju. Visibility, Spacing, and Operation of Freeway Lane Control Signals. Report no. FHWA/TX-97/1498-3F. Texas Transportation Institute. Texas A&M University, 1996. https://rosap.ntl.bts.gov/view/dot/82906.
Ullman, Gerald L., et al. Visibility, Spacing, and Operation of Freeway Lane Control Signals. Texas Transportation Institute. Texas A&M University, 1996, Report no. FHWA/TX-97/1498-3F, ROSA P. https://rosap.ntl.bts.gov/view/dot/82906.
ROSA P serves as an archival repository of USDOT-published products including scientific
findings, journal articles, guidelines, recommendations, or other information authored or co-authored by
USDOT or funded partners. As a repository, ROSA P retains documents in their original published format to
ensure public access to scientific information.
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