Found 2 reference links starting with TR:

Transportation Research Board

Transportation Research Board

The Transportation Research Board is a division of the National Academy of Sciences, formerly, the National Research Council of the United States which serves as an independent adviser to the President of the United States, the Congress and federal agencies on scientific and technical questions of national importance.

Category: Transportation

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Travel Journal

Travel Journal

Lets you document your travel experience, share it with friends and family and get great tips from the travelers community.

Category: Travel

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