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Author: Ahmad Khorashadi Publisher: ISBN: Category : Express highways Languages : en Pages : 140
Book Description
Accident rates (fatal, fatal plus injury, total, wet, and dark) were analyzed using analysis of variance (ANOVA) and analysis of covariance (ANCOVA) methods. The analyses were intended to look at the systematic differences in accident rates between ramps of different design, stratified by whether a ramp was in a rural or urban area, as well as whether it was an on-ramp or an off-ramp. Finally, a series of ANCOVA models was run, again stratified by rural/urban and on/off-ramp status, which included the measured ramp traffic volume as a covariant, and ramp configurations were noted to assess the differences between pairs of ramp configurations with respect to accident rates. The statistical analysis of accident data and findings are presented along with the findings of other literature to provide an update to a previously published report entitled "The Effect of Ramp Type and Geometry on Accidents" (1966), second edition, R.A. Lundy, published by the Traffic Department, Division of Highways, Department of Public Works, State of California
Author: Ahmad Khorashadi Publisher: ISBN: Category : Express highways Languages : en Pages : 140
Book Description
Accident rates (fatal, fatal plus injury, total, wet, and dark) were analyzed using analysis of variance (ANOVA) and analysis of covariance (ANCOVA) methods. The analyses were intended to look at the systematic differences in accident rates between ramps of different design, stratified by whether a ramp was in a rural or urban area, as well as whether it was an on-ramp or an off-ramp. Finally, a series of ANCOVA models was run, again stratified by rural/urban and on/off-ramp status, which included the measured ramp traffic volume as a covariant, and ramp configurations were noted to assess the differences between pairs of ramp configurations with respect to accident rates. The statistical analysis of accident data and findings are presented along with the findings of other literature to provide an update to a previously published report entitled "The Effect of Ramp Type and Geometry on Accidents" (1966), second edition, R.A. Lundy, published by the Traffic Department, Division of Highways, Department of Public Works, State of California
Author: Darren J. Torbic Publisher: Transportation Research Board ISBN: 0309258545 Category : Technology & Engineering Languages : en Pages : 131
Book Description
"TRB's National Cooperative Highway Research Program (NCHRP) Report 730: Design Guidance for Freeway Mainline Ramp Terminals presents design guidance for freeway mainline ramp terminals based on current driver and vehicle behavior. Appendixes A to D to NCHRP Report 730 were not published as part of the print or PDF version of the report. They are only available electronically through the following links: Appendix A: Aerial View of Study Locations. Appendix B: Histograms of Observed Acceleration Rates. Appendix C: Verbal Instructions for Behavioral Study. Appendix D: Potential Changes Proposed for Consideration in the Next Edition of the Green Book (Note: Appendix D contains tracked changes that have been intentionally left intact--i.e., not accepted.)" Appendices are available at: http://www.trb.org/Highways1/Blurbs/167516.aspx--
Author: Ahmad Khorashadi
Author: Ahmad Khorashadi
Author: California. Division of Highways
Author: 
Author: 
Author: Darren J. Torbic
Author: James M. Twomey
Author: 
Author: 
Author: R. Ervin
Author: United States. Federal Highway Administration