What is BS EN 13036-3 - horizontal drainability of a road surface about?  
The horizontal drainability of relatively smooth surfaces simulates the drainage of water from the contact area beneath a moving vehicle tyre. BS EN 13036-3 is a third part of the multi-series that discusses road and airfield surface characteristics.
BS EN 13036-3 describes a method for determining the horizontal drainability of a road surface as an indicator of relatively low surface texture using the outflow meter as a stationary device.
The method provides a measure of the drain ability in the road/tyre contact area for use on all smooth nonporous road surfaces (less than 0,4 mm mean profile depth) either in the field or in the laboratory.
Who is BS EN 13036-3 - horizontal drainability of a road surface for? 
BS EN 13036-3 on determining the horizontal drainability of a road surface is useful for: 
- Road maintenance and management authorities
- Airport authorities
- Project managers
- The construction industry
- Civil engineers
- Contractors
- Safety and accident prevention bodies
Why should you use BS EN 13036-3 - horizontal drainability of a road surface?  
Through road/vehicle dynamic interaction and vehicle vibration, the road profile evenness affects safety (tire contact forces), ride quality, energy consumption, vehicle wear as well as pavement and road durability.
Three test methods are described in the EN 13036 series of standards for assessing macrotexture which is used in different applications, depending on the availability of equipment, measuring speed requirement, and surface texture range. These test methods can be used as part of the evaluation of surface skid resistance in accordance with BS EN 13036-3.
BS EN 13036-3 is a step towards ensuring that adequate safety measures are in place to maintain a safe surface.
