The Regional Transportation District will be doing repairs to its downtown Denver light rail network, necessitating the shutdown of four of those lines for 10 days starting Friday evening.

The D, F, H and L lines will be closed starting 8 p.m. Friday until 3 a.m. Sept. 24, as work crews replace tracks and components associated with RTD’s original light rail service. The repair work, funded by a $2.5 million FASTER transit grant from the Colorado Department of Transportation, will center on the intersection of 19th and California streets.

The work will cause the suspension of light rail service between the 30th and Downing and the Theatre District/Convention Center stations. Shuttle buses, supplemented by charter buses, will substitute for the trains during the 10-day closure.

RTD calls the project a “complex, technically challenging” effort that has been in the planning stages for years as infrastructure downtown begins to reach the end of its life. Specifically, curved-track rail sections adjacent to the intersection of 19th and California streets will be replaced.

While the project is under way, temporary stop locations and detours will be in effect for bus routes 28, 38, 43, 44, 122X, FF7, Free MetroRide and RX. All lanes will be closed on 19th Street between Stout and California streets, and on California Street between 18th Street and Broadway.

More details about the work, including the bus shuttle schedule, are available on RTD’s website.