The Justice Department ordered the Washington, D.C., subway system to place raised bumps on the edges of its subway platforms to alert blind people, a change that was estimated to cost $30 million. However, the National Federation of Blind People opposed the mandate because it believed that blind people would be likely to trip over the bumps and fall in front of trains.

The D.C. Metro already features a number of conveniences for its disabled passengers, including platforms that are slightly sloped away from the track bed in case someone's wheelchair should happen to become unlocked.

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