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Citation |
Wunderlich RC. Transp. Res. Rec. 1985; 1027: 14-19. |
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Copyright |
(Copyright © 1985, Transportation Research Board, National Research Council, National Academy of Sciences USA, Publisher SAGE Publishing) |
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DOI |
unavailable |
PMID |
unavailable |
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Abstract |
Presented in this paper are the results of a study conducted to evaluate the effectiveness of improved delineation technique in reducing accident frequency at freeway gore areas with crash cushions. Four delineation treatments were developed. Three treatments included only reflective static elements, whereas the fourth consisted of both static elements and flashing lights. Each treatment was installed at two sites and two additional sites where no changes were made were used as controls. The repair history of each site was used as an indicator of accident frequency. Treatment effectiveness was assessed by comparing the repair rate before treatment installation to the repair rate after treatment installation. The analysis revealed that the treatment that combined static elements with flashing lights did reduce the frequency of repairs at sites with high initial repair rates (9 to 12 per year). In general, treatments with only static elements had little effect on the repair rate at sites with moderate initial repair rates (3 to 6 repairs per year). However, one static treatment was more effective than the group when the group was considered as a whole. Language: en |
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Keywords |
TRANSPORTATION; HIGHWAY SIGNS, SIGNALS AND MARKINGS - Visibility; HIGHWAY SYSTEMS - Repair |