PURPOSE: This rule prescribes the use, specifications, and maintenance of retroreflectorized targets and lenses used as track switch position indicators.

1. (1) Railroads operating within Missouri may use on main line switches either retroreflectorized lenses or retroreflectorized targets in accordance with the provisions of this rule.

2. (2) Retroreflectorized targets used on main lines covered by the requirements of section 389.710, RSMo, shall—

   1. (A) Be mounted to show a red aspect that is at least one hundred forty (140) square inches in area whenever the switch is lined against the main line; and
   2. (B) Meet the retroreflectivity and maintenance requirements in 7 CSR 265-8.018.

3. (3) Retroreflectorized lenses used on main lines covered by the requirements of section 389.710, RSMo, shall—

   1. (A) Be mounted to show a red aspect that is at least four and five-eighths inches (4 5/8") in diameter or seventeen and two-thirds (17 2/3) square inches in area whenever the switch is lined against the main line;
   2. (B) Be sealed against dust and moisture by a smooth plastic covering; and
   3. (C) Meet the retroreflectivity and maintenance requirements set forth in 7 CSR 265-8.018.

AUTHORITY: section 622.027, RSMo 2016.* This rule originally filed as 4 CSR 265-8.020. Emergency rule filed June 14, 1985, effective July 1, 1985, expired Oct. 28, 1985. Original rule filed Aug. 1, 1985, effective Oct. 29, 1985. Amended: Filed May 2, 1991, effective Dec. 9, 1991. Amended: Filed June 22, 1998, effective Feb. 28, 1999. Moved and amended: Filed March 9, 2018, effective Oct. 30, 2018.

*Original authority: 622.027, RSMo 1985, amended 1993, 1995.