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Author: Paul J. Carlson Publisher: ISBN: Category : Reflectance Languages : en Pages : 34
Book Description
The current U.S. practice for measuring retro-reflective sheeting materials for traffic signs primarily is based on a standard measurement geometry of 0.2 degrees and -4.0 degrees, referring to the observation and entrance angles of retro-reflectors, respectively (correct?). When combined, these two angles represent a specific geometry for testing retro-reflective sheeting materials. This geometry was chosen for various reasons, but it does not reflect realistic driving situations. This report details the work that was performed to reevaluate the specified geometry for measuring the performance of retro-reflective sheeting materials. The recommendations include a revised standard measurement geometry for retro-reflective sheeting materials, various changes to the appropriate specifications, a revised set of minimum in-service retroreflectivity levels at the revised standard measurement geometry, and considerations for how agencies can accommodate larger vehicles with respect to the proposed minimum retroreflectivity levels.
Author: Paul J. Carlson Publisher: ISBN: Category : Reflectance Languages : en Pages : 34
Book Description
The current U.S. practice for measuring retro-reflective sheeting materials for traffic signs primarily is based on a standard measurement geometry of 0.2 degrees and -4.0 degrees, referring to the observation and entrance angles of retro-reflectors, respectively (correct?). When combined, these two angles represent a specific geometry for testing retro-reflective sheeting materials. This geometry was chosen for various reasons, but it does not reflect realistic driving situations. This report details the work that was performed to reevaluate the specified geometry for measuring the performance of retro-reflective sheeting materials. The recommendations include a revised standard measurement geometry for retro-reflective sheeting materials, various changes to the appropriate specifications, a revised set of minimum in-service retroreflectivity levels at the revised standard measurement geometry, and considerations for how agencies can accommodate larger vehicles with respect to the proposed minimum retroreflectivity levels.
Author: American Society for Testing and Materials Publisher: ASTM International ISBN: Category : Architecture Languages : en Pages : 774
Book Description
Continues the series by including all revisions to existing standards made since the publications of the fifth edition (no date noted) and a number of new standards. They provide guidance in the instrumentation and visual appraisal of the appearance of materials, and to describe specific measurement
Author: Highway Innovative Technology Evaluation Center (U.S.) Publisher: ASCE Publications ISBN: 9780784474389 Category : Technology & Engineering Languages : en Pages : 60
Book Description
Prepared by the Highway Innovative Technology Evaluation Center, a CERF Service Center. This report presents the HITEC evaluation of a plastic stop sign manufactured by ALL SIGN Products, Inc. The evaluations of the ALL SIGN Polycarbonate Stop SignØinclude the results of a series of laboratoryØand field tests and an analytical evaluation.ØThe evaluation tested the product's retroreflectivity, color, and appearance under normal conditions and the effects of weathering and graffiti.
Author: Paul J. Carlson
Author: Paul J. Carlson
Author: United States. Federal Supply Service
Author: Gerardo W. Flintsch
Author: Kent L. Black
Author: United States. Federal Supply Service
Author: American Society for Testing and Materials
Author: Highway Innovative Technology Evaluation Center (U.S.)
Author: I. Nimeroff
Author: 
Author: