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Advocates have sought bumpy tiles for about 20 years

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The battle over installing bumpy tiles at Metro's stations has been going on for about 20 years, long after the Americans with Disabilities Act called for adding "detectable warnings" known as truncated domes to platform edges in train stations by 1993. Metro board member Mortimer Downey recalled the agency's resistance when he served as U.S. Department of Transportation deputy secretary from...

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