Road Traffic Signs. Testing and Performance of Microprismatic Retroreflective Sheeting Materials. Specification PDF Download
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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: Publisher: Stationery Office Books (TSO) ISBN: 9780115530524 Category : Business & Economics Languages : en Pages : 236
Book Description
In the operation and maintenance of highway networks, it is necessary from time to time to put in place temporary traffic management measures to facilitate safe road works or temporary closures or incident management, whilst keeping the traffic flowing as freely as possible. The Operations Document provides guidance for those responsible for planning, managing and participating in operations to implement, maintain and remove temporary traffic management arrangements.
Author: Standards Australia (Organization) Publisher: ISBN: 9781743427859 Category : Civil engineering Languages : en Pages : 56
Book Description
"Specifies the performance requirements for retroreflective sheeting used in the manufacture of road signs and related traffic control devices. It does not apply to retroreflective pavement markings"--Standards New Zealand website.
Author: Paul John Carlson Publisher: ISBN: Category : Reflectance Languages : en Pages : 106
Book Description
This report includes an updated set of recommended MR levels for traffic signs based on recent developments in vehicle headlamps, vehicle types/sizes, nighttime driver needs, and newer sheeting materials. The updated MR levels are also based on more robust computer modeling of retroreflective sheeting performance.
Author: Frank D. Shepard Publisher: ISBN: Category : Reflective materials Languages : en Pages : 40
Book Description
The Department spends approximately a half million dollars annually on reflective sheeting for highway signs. For years this sheeting has been purchased primarily from one manufacturer, because of the inability of other firms to produce a competitive product. However, during the past two years, a number of other manufacturers have been submitting reflective materials for consideration. As the number of firms capable of producing reflective materials has increased substantially, it has become evident that the Department needs a standard procedure for determining if the reflective materials submitted possess the characteristics desired. A project was initiated to establish specifications, along with an evaluation procedure, for engineering grade reflective sheeting for use in highway signs that would be useful to the Materials Testing Division. The specifications presented here are a compilation of those presently being used by the Department, those recommended in federal specification L-S-300B (July 12, 1974), and those presently being used by other states. Emphasis has been placed on those specifications which will ensure that the Department is getting a reliable product.
Author: Publisher: ISBN: 9781776730353 Category : Reflective materials Languages : en Pages : 68
Book Description
"This Standard specifies the performance requirements for retroreflective sheeting used in the manufacture of road signs and related traffic control devices. It does not apply to retroreflective pavement markings..."--Page 6.
Author: British Standards Institute Staff
Author: British Standards Institute Staff
Author: Great Britain: Department for Transport
Author: Paul J. Carlson
Author: 
Author: Samir A. Ahmed
Author: Standards Australia (Organization)
Author: Gerardo W. Flintsch
Author: Paul John Carlson
Author: Frank D. Shepard
Author: