ASTM E2177 - 19 - Standard Test Method for Measuring the Coefficient of Retroreflected Luminance (RL) of Pavement Markings in a Standard Condition of Wetness

ASTM E2177 - 19

Standard Test Method for Measuring the Coefficient of Retroreflected Luminance (RL) of Pavement Markings in a Standard Condition of Wetness

Status : Current   Published : January 2019

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1.1 This test method covers the measurement of the wet retroreflective ( R L) properties of horizontal pavement marking materials, such as traffic stripes and road surface symbols, using a portable or mobile retroreflectometer that can be placed on or before the road marking to measure the retroreflection at the prescribed geometry.

1.2 This method of measuring the wet retroreflective properties ( R L) of pavement markings measures the wet retroreflectivity in a standard condition of wetness (see Fig. 1).

FIG. 1 Illustration of Measurement

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[This image has been removed.]

1.2.1  Discussion—This test condition typically exists ( 1) after a rainfall has ended and the pavement markings are still wet or ( 2) as the markings are wet from dew or humidity.

1.3 Retroreflective performance obtained with this test in conditions of wetness does not necessarily relate to how markings perform in conditions of rain, that is, as markings are being rained upon. Test Method E2832 defines a method to measure the performance of pavement markings in conditions of simulated rain.

1.4 This test method specifies the use of portable or mobile reflectometers that can measure pavement markings in accordance with Test Method E1710. 2 The entrance and observation angles required of the retroreflectometer in this test method are commonly referred to as “30 meter geometry.” 2

1.5 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.6  This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

1.7  This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.




Standard NumberASTM E2177 - 19
TitleStandard Test Method for Measuring the Coefficient of Retroreflected Luminance (RL) of Pavement Markings in a Standard Condition of Wetness
StatusCurrent
Publication Date01 January 2019
Normative References(Required to achieve compliance to this standard)No other standards are normatively referenced
Informative References(Provided for Information)No other standards are informatively referenced
Descriptors dry retroreflection, mobile retroreflectometers, pavement markings, portable retroreflectometer, retroreflection in wet conditions
ICS93.080.20
PublisherASTM
FormatA4
DeliveryYes
Pages6
File Size181 KB
Price£40.00


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