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Pages 13-15

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 13...
... Strategies that may lead to diversion of traffic and/or have a system-wide effect will require more extensive data collection efforts and hence may not be cost effective. Similarly, treatments that may have a small effect on total crashes may require a significantly large sample of sites to conduct an evaluation and hence may not be cost effective.
From page 14...
... However, in attempting to do this, we realized that in order for this crash harm analysis to be useful, we would need to include measures of both the expected size of the effect (before the evaluation) and either the proportion of signalized intersections or the proportion of signalized-intersection crashes that might be affected by each treatment to be assessed.
From page 15...
... • Who maintains the crash data? • What years of crash data are available?


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