Technical requirements for railway in radius of railroad crossings in Vietnam

Technical requirements for railway in radius of railroad crossings in Vietnam

Check rail or auxiliary structures shall be required at railroad crossings so that the distance between inside of primary rail and the check rail or the auxiliary structures (hereinafter referred to as clearance) satisfies requirements below:

- Check rail or auxiliary structures creating a clearance shall extend the full width of road shoulder;

- Clearance width:

= With respect to railroad cross located on straight rail or curved rail whose radius is at least 500 m: clearance width shall be 75 mm;

= With respect to railroad crossings located on curved rail whose radius is less than 500 m: clearance width shall equal 75 mm + 1/2 of widening of the curved section according to National Technical Regulation on railway operation;

- Minimum clearance depth is 45 mm;

- If road section inside of the railway is made of asphalt concrete, check rail shall be required; check rail elevation shall equal to that of primary rail;

- If road section inside of the railway is made of slabs, edges of slabs that are adjacent to primary rail shall be specifically designed to form clearance;

- If check rail is installed in accordance with Point a of this Clause, both ends of the rail shall curve inwards; the length of curved ends of check rail shall be 500 mm, rail clearance at the starting position of the curved section shall conform to Point b of this Clause, rail clearance at the end position of the curved section shall be 250 mm.

The starting position and end position of check rail shall be closely connected to sleepers;

- Rail connection shall not be located in the radius of railroad crossings. In case road at railroad crossing is wide, rail connection shall be welded or stretched and clipped if it cannot be welded yet;

- Rail fastening accessories shall be adequate and firmly connected.

More details can be found in Circular 29/2023/TT-BGTVT taking effect on December 1, 2023, replacing Circular 25/2018/TT-BGTVT and Circular 07/2022/TT-BGTVT.

>> CLICK HERE TO READ THIS ARTICLE IN VIETNAMESE