| Title | Limited sight distance warning for vertical curves |
|---|---|
| Record ID | 42238 |
| Personal Name Creator |
Freedman, Mark; Staplin, L. K.; Decina, Lawrence E.; Farber, Eugene I. |
| Source | vi, 81 p. : ill. |
| Corporate Creator | Ketron, Inc. |
| Corporate Contributor |
United States. Federal Highway Administration. Office of Research. Systems Technology Division |
| Publisher | United States. Department of Transportation. Federal Highway Administration. Offices of Research and Development |
| Publication Date | 19841100 |
| Language | English |
| Abstract | This is a summary of the procedures and findings of a study of highway signs to warn of restricted sight distance due to crest vertical curves. Driver awareness, understanding, and response to the existing LIMITED SIGHT DISTANCE (LSD) sign and several alternative signs were measured. Following a study of performance requirements, a large number of preliminary alternative sign designs were tested in a laboratory setting. Further laboratory testing of the five most promising designs was conducted to asses. driver comprehension and assimilation. The two most promising verbal and symbol alternative. were next eV6luated in a controlled field study and an observational field study, conducted at several vertical curves on two-lane rural roads." The controlled study indicated that both o. the alternative signs - one"with the legend SLOW HILL BLOCKS VIEW and the other with a symbol in combination with that message - were superior to the LSD sign. Th~ symbol sign with the supplementary legend SLOW HILL BLOCKS VIEW is recommend.d to replace the existing LSD (MUTCD Wl4-4) sign. |
| Rosap ID | dot:1011 |
| Rosap URL | https://rosap.ntl.bts.gov/view/dot/1011 |
| TRT Terms | Sight distance; Warning signs; Highway curves |
| Classification | NTL - HIGHWAY/ROAD TRANSPORTATION - HIGHWAY/ROAD TRANSPORTATION |
| Geographical Coverage |
United States |
| TRIS Online Accession No |
1353873 |
| Contract Number | DTFH61-82-C-00062 |
| Report Number | FHWA-RD-85-046 |
| Availability | Federal Highway Administration |
| Resource type | Tech Report |
| URL | https://ntlrepository.blob.core.windows.net/lib/42000/42200/42238/FHWA-RD-85-046.pdf |
| Format | |
| Database | NTL Digital Repository |