Warning efficacy of active versus passive warnings for unsignalized intersection and mid-block pedestrian crosswalks /
This study evaluated the efficacy of active versus passive warnings at uncontrolled pedestrian (ped) crosswalks (Xwalks), by comparing how these two warnings types influenced behavior of drivers approaching such Xwalks. Vehicle-Xwalk interactions were observed at 18 sites with passive, continuously...
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| Corporate Authors: | , , |
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| Other Authors: | , , , |
| Format: | Book |
| Language: | English |
| Published: |
St. Paul, Minn. : [Springfield, Va.] :
Minnesota Department of Transportation, Research Services Section ; [Available through the National Technical Information Service],
[2009]
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| Series: | Final report (Minnesota. Department of Transportation)
2009-03. |
| Subjects: |
MARC
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| 245 | 0 | 0 | |a Warning efficacy of active versus passive warnings for unsignalized intersection and mid-block pedestrian crosswalks / |c prepared by Thomas J. Smith, Curtis Hammond, Guruprasad Somasundaram, Nikolaos Papanikolopoulos. |
| 260 | |a St. Paul, Minn. : |b Minnesota Department of Transportation, Research Services Section ; |a [Springfield, Va.] : |b [Available through the National Technical Information Service], |c [2009] | ||
| 300 | |a 141 pages in various pagings : |b color illustrations, charts ; |c 28 cm. | ||
| 336 | |a text |b txt |2 rdacontent | ||
| 337 | |a unmediated |b n |2 rdamedia | ||
| 338 | |a volume |b nc |2 rdacarrier | ||
| 490 | 1 | |a Final report ; |v 2009-03 | |
| 536 | |a Performed by School of Kinesiology and Department of Computer Science, University of Minnesota, under contract no. |b 89261, work order 6 | ||
| 500 | |a "January 2009." | ||
| 504 | |a Includes bibliographical references (pages 64-62). | ||
| 530 | |a Also available via the Internet. | ||
| 520 | 3 | |a This study evaluated the efficacy of active versus passive warnings at uncontrolled pedestrian (ped) crosswalks (Xwalks), by comparing how these two warnings types influenced behavior of drivers approaching such Xwalks. Vehicle-Xwalk interactions were observed at 18 sites with passive, continuously flashing, or ped-activated warnings, yielding 7,305 no ped present and 596 ped present interactions. Vehicle velocities and accelerations were averaged for each interaction. Findings show no significant effect of warning type on overall velocities for either interaction type. With peds present only, for average velocities at successive 5m distances from the Xwalk, a downward trend in velocities from 25 to 5m is observed for passive and active warning sites, but not for pedactivated warning sites. Various lines of evidence point to a number of sources of ambiguity regarding the salience of uncontrolled Xwalk warnings, resulting in behavioral uncertainty by drivers interacting with such warnings. Mixed findings on effects of warning type in this study point to the need for further analysis of this problem area. | |
| 650 | 0 | |a Traffic signs and signals | |
| 650 | 0 | |a Roads |x Interchanges and intersections |x Safety measures | |
| 650 | 7 | |a Unsignalized intersections. |2 trt | |
| 650 | 7 | |a Crosswalks. |2 trt | |
| 650 | 7 | |a Roads |x Interchanges and intersections |x Safety measures |2 fast |0 (OCoLC)fst01098677 | |
| 650 | 7 | |a Traffic signs and signals |2 fast |0 (OCoLC)fst01154277 | |
| 700 | 1 | |a Smith, Thomas J. | |
| 700 | 1 | |a Hammond, Curtis. | |
| 700 | 1 | |a Somasundaram, Guruprasad. | |
| 700 | 1 | |a Papanikolopoulos, Nikolaos P. | |
| 710 | 1 | |a Minnesota. |b Department of Transportation. |b Research Services Section. | |
| 710 | 2 | |a University of Minnesota. |b School of Kinesiology. | |
| 710 | 2 | |a University of Minnesota. |b Department of Computer Science and Engineering. | |
| 830 | 0 | |a Final report (Minnesota. Department of Transportation) |v 2009-03. | |
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