1. Scope

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).

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.

Note 1Test Method E2176 defines a method to use 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 . The entrance and observation angles required of the retroreflectometer in this test method are commonly referred to as 30 meter geometry.

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 and health practices and determine the applicability of regulatory limitations prior to use.

2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

Other Standard

ASTM Standards

B965 Specification for High Performance Tin-Coated Annealed Copper Wire Intended for Electrical and Electronic Application for Solderability

D6359 Specification for Minimum Retroreflectance of Newly Applied Pavement Marking Using Portable Hand-Operated Instruments

E177 Practice for Use of the Terms Precision and Bias in ASTM Test Methods

E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method

E1710 Test Method for Measurement of Retroreflective Pavement Marking Materials with CEN-Prescribed Geometry Using a Portable Retroreflectometer

E2176 Test Method for Measuring the Coefficient of Retroreflected Luminance of Pavement Markings in a Standard Condition of Continuous Wetting (RL-Rain)

Keywords

dry retroreflection; mobile retroreflectometers; pavement markings; portable retroreflectometer; retroreflection in wet conditions; Dry retroreflection; Mobile retroreflectometers; Pavement marking materials; Portable retroreflectometers; Retroreflected luminance (R L ); Retroreflective marking materials; Wet retroreflective (R L ) properties;

ICS Code

ICS Number Code 93.080.20 (Road construction materials)

DOI: 10.1520/E2177-01R09

ASTM International is a member of CrossRef.