Road spline, 4 lane road - 3.5m lanes, 40mph with no traffic level. Designed to be 0.2m over baseboard level for correct car height. Texture derived from those by cgtextures.com and Andi06. To diagram 1004 & 1005. See http://www.legislation.gov.uk/uksi/2002/3113/schedule/6/made for details.