Impacts of maintaining traffic signs within minimum retroreflectivity guidelines
S Taori, HW McGee - Transportation research record, 1998 - journals.sagepub.com
The Federal Highway Administration has developed guidelines for minimum levels of
retroreflectivity for four groups of signs:(a) black-on-yellow/orange warning signs,(b) black-
on-white regulatory or guide signs,(c) white-on-red regulatory signs, and (d) white-on-green
guide signs. The impact of implementing these guidelines was assessed by estimating the
percentage of signs not meeting the proposed minimum levels and the cost of replacing
such signs. Various state and local highway agencies assisted in the study by measuring the …
retroreflectivity for four groups of signs:(a) black-on-yellow/orange warning signs,(b) black-
on-white regulatory or guide signs,(c) white-on-red regulatory signs, and (d) white-on-green
guide signs. The impact of implementing these guidelines was assessed by estimating the
percentage of signs not meeting the proposed minimum levels and the cost of replacing
such signs. Various state and local highway agencies assisted in the study by measuring the …
[HTML][HTML] Impacts on state and local agencies for maintaining traffic signs within minimum retroreflectivity guidelines
HW McGee, S Taori - 1998 - rosap.ntl.bts.gov
The Federal Highway Administration (FHWA) has developed guidelines for minimum
retroreflectivity levels for four groups of signs: 1) yellow/orange-on-black warning signs, 2)
black-on-white regulatory signs, 3) white-on-red regulatory signs, and 4) white-on-green
guide signs. As part of the development of these recommended values, the FHWA obtained
the assistance of several State and local highway agencies. These agencies assisted by
measuring the retroreflectivity of a pre-determined sample of signs, providing data on sign …
retroreflectivity levels for four groups of signs: 1) yellow/orange-on-black warning signs, 2)
black-on-white regulatory signs, 3) white-on-red regulatory signs, and 4) white-on-green
guide signs. As part of the development of these recommended values, the FHWA obtained
the assistance of several State and local highway agencies. These agencies assisted by
measuring the retroreflectivity of a pre-determined sample of signs, providing data on sign …
