Application of Crash Modification Factors for Access Management, Volume 1: Practitioner's Guide (2021) / Chapter Skim
Currently Skimming:
Pages 108-119
The Chapter Skim interface presents what we've algorithmically identified as the most significant single chunk of text within every page in the chapter.
Select key terms on the right to highlight them within pages of the chapter.
From page 108... ...
108 The objective of this guide is to assist transportation agencies in quantifying the safety impacts of their decisions related to access management. The safety performance can then be used in the decision process to compare against other quantitative measures (e.g., costs, operational efficiency, and environmental impacts)
|
From page 109... ...
Communicating Results 109 differences in levels of expertise and experience in applying CMFs and SPFs to quantify safety performance and understanding and correctly interpreting the results. The following is a list of potential audiences from the transportation planning, design, regulatory, and operational community that will benefit from the information provided in this guide: • Agency (state, regional, and local)
|
From page 110... ...
110 Application of Crash Modification Factors for Access Management While the upstream approach is not the focus of this chapter, it is aimed at influencing statewide processes and policies. Analysts can achieve this through enhanced coordination between state agencies, such as creating or joining multidisciplinary groups composed of technical audiences (Beer et al.
|
From page 111... ...
Communicating Results 111 It is important to consider the target audience and the communication method when selecting a measure to present and represent the results. Technical audiences may be interested in the estimated number of crashes by type and severity for the various alternatives as well as the benefit-cost ratio.
|
From page 112... ...
112 Application of Crash Modification Factors for Access Management with treatment (0.7 p 0.1)
|
From page 113... ...
Communicating Results 113 number of suspected serious injuries prevented from the project is approximately 0.36 per year (1.2 – 0.84) or 7.2 suspected serious injuries over the 20-year service life of the project.
|
From page 114... ...
114 Application of Crash Modification Factors for Access Management where an agency is considering the conversion of a two-way stop-controlled intersection along an urban arterial to a signalized intersection or a single-lane roundabout. The base condition represents no change in existing conditions (i.e., maintaining the urban, two-lane, two-way stop-controlled intersection)
|
From page 115... ...
Communicating Results 115 of crashes by severity. When presenting these results to non-technical audiences, it might be useful to describe the relative size of the bar and pie charts as well as the overall percent change in crashes as opposed to the percent change in each severity level.
|
From page 116... ...
116 Application of Crash Modification Factors for Access Management ~13 crashes per year 5% fewer crashes 39% fewer crashes Fatal Injury (K) , 0.031, 0% Fatal Injury (K)
|
From page 117... ...
Communicating Results 117 Figure 128. Example presentation of present value costs and bene ts for alternative comparison.
|
From page 118... ...
118 Application of Crash Modification Factors for Access Management in the understanding and interpretation of results, particularly for public officials and the public. It may be easier for a non-technical audience to interpret a side-by-side graphical comparison, such as a bar chart, than it is to interpret two columns of numbers in a table.
|
From page 119... ...
Communicating Results 119 There is a wide range of options to communicate the safety performance of access management strategies, including various measures and formats. While the methods in this guide can help to quantify safety performance and identify safety-beneficial alternatives, the effort is futile unless decision-makers use the results to inform decisions.
|
Key Terms
This material may be derived from roughly machine-read images, and so is provided only to facilitate research.
More
information on Chapter Skim is available.