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| Author | : Márcia Helena Macêdo |
| Publisher | : |
| Total Pages | : 372 |
| Release | : 1999 |
| Genre | : |
| ISBN | : |
| Author | : Charles V. Zegeer |
| Publisher | : |
| Total Pages | : 32 |
| Release | : 1992 |
| Genre | : |
| ISBN | : |
| Author | : Douglas W. Harwood |
| Publisher | : |
| Total Pages | : 100 |
| Release | : 2014 |
| Genre | : Express highways |
| ISBN | : |
"TRB's National Cooperative Highway Research Program (NCHRP) Report 790: Factors Contributing to Median Encroachments and Cross-Median Crashes investigates the factors that contribute to median-related crashes and identifies design treatments and countermeasures that can be applied to improve median safety on divided highways."--Publisher description.
| Author | : |
| Publisher | : National Academies Press |
| Total Pages | : 48 |
| Release | : 2009 |
| Genre | : Median strips |
| ISBN | : 0309117828 |
This report contains the findings of research performed to quantify the safety and operational impacts of design element trade-offs and their associated risks. The report details the research performed and includes specific recommended crash prediction models and Accident Modification Factors (AMFs) for shoulder width and median width on rural four-lane roads.
| Author | : Hampton Clay Gabler |
| Publisher | : |
| Total Pages | : 192 |
| Release | : 2005 |
| Genre | : Median strips |
| ISBN | : |
| Author | : |
| Publisher | : |
| Total Pages | : 4 |
| Release | : 1993 |
| Genre | : Median strips |
| ISBN | : |
| Author | : |
| Publisher | : |
| Total Pages | : 44 |
| Release | : 1983 |
| Genre | : Highway research |
| ISBN | : |
| Author | : Charles V. Zegeer |
| Publisher | : |
| Total Pages | : 214 |
| Release | : 1987 |
| Genre | : Highway engineering |
| ISBN | : |
This study was intended to quantify the benefits and costs resulting from lane widening, shoulder widening, shoulder surfacing, sideslope flattening, and roadside improvements. Detailed traffic, accident, and roadway data were collected on 4,951 miles of two lane roads in seven states. An accident predictive model and statistical tests were used to determine expected accident reductions related to various geometric improvements. Construction cost data from several states were used to develop a cost model for numerous types of roadway and roadside projects. This volume contains the final report and four appendixes. The final report contains detailed information on data collection and data analysis and conclusions and recommendations. The appendixes contain detailed information on the literature review, photographs used for the rural and urban roadside hazard scales, and economic analysis inputs.
| Author | : Andrew W. Ooms |
| Publisher | : |
| Total Pages | : 188 |
| Release | : 2010 |
| Genre | : |
| ISBN | : |
| Author | : United States. Public Roads Bureau |
| Publisher | : |
| Total Pages | : 108 |
| Release | : 1969 |
| Genre | : Accidents |
| ISBN | : |
Principal findings of this study were that geometrics alone account for only a small portion of the variance in accidents and that no relationship could be established between fatalities and the geometrics studied. The geometrics studied include several types of interchanges, paved shoulders, sight distance, delineators, surface types, and other variables. Mathematical models were developed which can provide estimates of the average number of accidents on a particular type of highway or interchange, using the appropriate variables.
