An Evaluation of Shoulder Rumble Strips in Montana 2003
An Evaluation of Shoulder Rumble Strips in Montana 2003
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Crash rates for rumble strip segments increased by 14.5 percent from the before to after period, while severity increased by 7.2 percent. Crash rates for the parallel control segments increased similarly, by 15.3 percent, while severity decreased by a margin of 2.9 percent. Here the indication is that rumble strip implementation did not radically affect crash rate, while severity rates increased.
26 Table 4. Global Rollover Interstate Crash Summary Interstate Rautes Rjmble 3rip Segments Control... Segments (# of Segments) Avg. Crash fete Avg. Severity fete Avg. Crash fete Avg. Severity fete 1-15 (4) Before 0.077 0.312 0.086 0.469 After 0.087 0.260 0.203 0.731 % Change 1 3.0% -16.7% 136.0% 55.9% 1-90 (9) Before 0.069 0.271 0.141 0.579 After 0.091 0.350 0.118 0.486 % Change 31.9% 29.2% -16.3% -16.1% 1-94 (4) Before 0.103 0.432 0.112 0.581 After 0.067 0.298 0.161 0.499 % Change -35.0% -31.0% 43.8% -14.1% Interstate Totals (17) Before 0.076 0.305 0.124 0.556 After 0.087 0.327 0.143 0.540 % Change 14.5% 7.2% 15.3% -2.9% The considerable variation across tine tliree Interstate routes studied, for all off- road crashes as well as rollover crashes, may explain in part why some states have realized dramatically different results than others through previous investigations.
What to read after An Evaluation of Shoulder Rumble Strips in Montana 2003?
You can find similar books in the "Read Also" column, or choose other free books by Montana.Dept. of Transportation.Research Section to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Crash rates for rumble strip segments increased by 14.5 percent from the before to after period, while severity increased by 7.2 percent. Crash rates for the parallel control segments increased similarly, by 15.3 percent, while severity decreased by a margin of 2.9 percent. Here the indication is that rumble strip implementation did not radically affect crash rate, while severity rates increased.
26 Table 4. Global Rollover Interstate Crash Summary Interstate Rautes Rjmble 3rip Segments Control... Segments (# of Segments) Avg. Crash fete Avg. Severity fete Avg. Crash fete Avg. Severity fete 1-15 (4) Before 0.077 0.312 0.086 0.469 After 0.087 0.260 0.203 0.731 % Change 1 3.0% -16.7% 136.0% 55.9% 1-90 (9) Before 0.069 0.271 0.141 0.579 After 0.091 0.350 0.118 0.486 % Change 31.9% 29.2% -16.3% -16.1% 1-94 (4) Before 0.103 0.432 0.112 0.581 After 0.067 0.298 0.161 0.499 % Change -35.0% -31.0% 43.8% -14.1% Interstate Totals (17) Before 0.076 0.305 0.124 0.556 After 0.087 0.327 0.143 0.540 % Change 14.5% 7.2% 15.3% -2.9% The considerable variation across tine tliree Interstate routes studied, for all off- road crashes as well as rollover crashes, may explain in part why some states have realized dramatically different results than others through previous investigations.
What to read after An Evaluation of Shoulder Rumble Strips in Montana 2003?
You can find similar books in the "Read Also" column, or choose other free books by Montana.Dept. of Transportation.Research Section to read onlineMoreLess
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