U.S. flag An official website of the United States government.
Official websites use .gov

A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS

A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

Federal Railroad Administration

rosaP Repository & Open Science Access Portal

The Federal Railroad Administration (FRA) promotes safe and environmentally sound rail transportation. The FRA conducts research and development tests to evaluate projects in support of its safety mission and to enhance the railroad system as a national transportation resource. Public education campaigns on highway-rail grade crossing safety and the danger of trespassing on rail property are also administered by FRA. Bookmark this collection https://rosap.ntl.bts.gov/collection_fra or https://doi.org/10.21949/1530835.

(6)
(44)
(53)
(79)
(68)
(88)
(73)
(32)
(33)
(40)
(30)
(26)
(15)
(11)
(29)
(13)
(40)
(28)
(42)
(47)
(28)
(18)
(30)
(20)
(21)
(18)
(22)
(17)
(10)
(10)
(18)
(5)
(27)
(9)
(3)
(3)
(1)
(3)
(2)
(1)
(1)
(5)
(3)
(14)
(10)
(10)
(8)
(10)
(15)
(11)
(5)
(1)
(2)
(3)
(1)
0 of 55
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(5)
(1)
(1)
(2)
(3)
(1)
(1)
(2)
(3)
(1)
(2)
(9)
(1)
(3)
(1)
(1)
(1)
(2)
(1)
(2)
(1)
(2)
(1)
(2)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(15)
(1)
(1)
(3)
(2)
(3)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(3)
(1)
(4)
(4)
(1)
(1)
(2)
(2)
(2)
(9)
(1)
(2)
(6)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(4)
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(3)
(1)
(1)
(2)
(1)
(1)
(4)
(4)
(1)
(1)
(1)
(1)
(1)
(3)
(1)
(2)
(1)
(1)
(1)
(3)
(1)
(4)
(1)
(1)
(1)
(1)
(4)
(6)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(7)
(1)
(1)
(2)
(3)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(2)
(3)
(3)
(1)
(1)
(1)
(1)
(1)
(23)
(12)
(1)
(6)
(1)
(3)
(3)
(2)
(9)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(2)
(4)
(1)
(3)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(2)
(1)
(3)
(2)
(1)
(2)
(1)
(1)
(1)
(3)
(1)
(3)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(13)
(12)
(2)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(2)
(1)
(1)
(5)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(3)
(6)
(17)
(7)
(1)
(3)
(1)
(1)
(6)
(1)
(1)
(1)
(1)
(2)
(1)
(2)
(2)
(2)
(9)
(2)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(3)
(1)
(1)
(2)
(2)
(1)
(1)
(1)
(1)
(4)
(3)
(1)
(1)
(1)
(3)
(2)
(1)
(1)
(1)
(1)
(3)
(1)
(4)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(2)
(1)
(2)
(2)
(2)
(1)
(4)
(2)
(1)
(1)
(3)
(1)
(2)
(1)
(1)
(4)
(1)
(1)
(2)
(20)
(1)
(1)
(3)
(1)
(2)
(7)
(1)
(1)
(4)
(1)
(1)
(1)
(1)
(1)
(3)
(1)
(2)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(3)
(1)
(8)
(1)
(1)
(1)
(1)
(2)
(1)
(3)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(8)
(1)
(4)
(9)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(4)
(1)
(1)
(1)
(1)
(1)
(3)
(7)
(1)
(1)
(2)
(1)
(1)
(2)
(1)
(1)
(2)
(1)
(2)
(1)
(1)
(1)
(2)
(1)
(2)
(1)
(2)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(2)
(5)
(2)
(6)
(1)
(4)
(6)
(19)
(2)
(1)
(7)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(3)
(1)
(1)
(1)
(3)
(1)
(1)
(1)
(3)
(1)
(1)
(4)
(1)
(3)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(3)
(1)
(1)
(1)
(1)
(1)
(3)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(6)
(3)
(1)
(1)
(1)
(1)
(2)
(5)
(1)
(4)
(3)
(1)
(1)
(6)
(1)
(2)
(1)
(2)
(1)
(1)
(4)
(3)
(6)
(2)
(1)
(1)
(7)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(2)
(1)
(2)
(2)
(1)
(2)
(2)
(3)
(3)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(5)
(1)
(6)
(1)
(1)
(1)
(1)
(6)
(1)
(20)
(1)
(1)
(2)
(2)
(1)
(1)
(2)
(3)
(6)
(2)
(13)
(16)
(3)
(1)
(5)
(1)
(3)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(3)
(5)
(3)
(1)
(1)
(1)
(2)
(1)
(1)
(2)
(4)
(2)
(1)
(2)
(2)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(3)
(4)
(1)
(3)
(5)
(1)
(1)
(2)
(18)
(1)
(1)
(5)
(1)
(4)
(1)
(1)
(3)
(3)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(3)
(5)
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(3)
(5)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(4)
(2)
(1)
(1)
(1)
(6)
(3)
(4)
(3)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(7)
(1)
(2)
(1)
(1)
(1)
(1)
(8)
(1)
(5)
(1)
(1)
(1)
(1)
(4)
(1)
(1)
(1)
(3)
(1)
(1)
(1)
(1)
(4)
(1)
(14)
(2)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(3)
(1)
(9)
(1)
(2)
(1)
(1)
(1)
(2)
(1)
(1)
(2)
(3)
(2)
(1)
(1)
(1)
(2)
(2)
(4)
(1)
(4)
(6)
(5)
(3)
(19)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(5)
(1)
(1)
(1)
(1)
(1)
(5)
(2)
(10)
(1)
(1)
(1)
(1)
(1)
(2)
(3)
(1)
(5)
(1)
(1)
(1)
(1)
(2)
(1)
(3)
(1)
(8)
(1)
(1)
(6)
(1)
(2)
(1)
(1)
(1)
(4)
(1)
(1)
(1)
(3)
(1)
(3)
(1)
(1)
(1)
(1)
(1)
(2)
(2)
(4)
(2)
(1)
(2)
(1)
(1)
(4)
(3)
(1)
(1)
(1)
(4)
(9)
(4)
(30)
(2)
(7)
(2)
(2)
(3)
(2)
(16)
(2)
(2)
(3)
(2)
(2)
(4)
(2)
(2)
(7)
(2)
(3)
(3)
(2)
(5)
(7)
(2)
(7)
(2)
(3)
(2)
(5)
(5)
(23)
(15)
(11)
(4)
(2)
(2)
(15)
(5)
(7)
(11)
(4)
(4)
(2)
(3)
(3)
(3)
(13)
(5)
(5)
(7)
(2)
(6)
(4)
(4)
(7)
(2)
(3)
(16)
(8)
(5)
(2)
(4)
(6)
(2)
(2)
(2)
(3)
(2)
(2)
(4)
(2)
(2)
(3)
(3)
(3)
(2)
(4)
(4)
(7)
(8)
(2)
(3)
(3)
(9)
(2)
(3)
(4)
(4)
(2)
(2)
(4)
(2)
(2)
(2)
(14)
(12)
(3)
(4)
(4)
(2)
(9)
(6)
(2)
(4)
(3)
(2)
(3)
(14)
(2)
(2)
(10)
(4)
(2)
(2)
(2)
(3)
(2)
(2)
(6)
(2)
(3)
(4)
(13)
(3)
(12)
(26)
(2)
(3)
(3)
(2)
(3)
(2)
(2)
(2)
(2)
(4)
(5)
(4)
(2)
(7)
(2)
(2)
(3)
(4)
(7)
(3)
(6)
(2)
(4)
(2)
(2)
(9)
(23)
(3)
(2)
(8)
(8)
(2)
(2)
(2)
(2)
(2)
(2)
(4)
(2)
(8)
(2)
(9)
(5)
(2)
(2)
(8)
(2)
(3)
(9)
(2)
(5)
(3)
(2)
(8)
(2)
(4)
(2)
(2)
(2)
(4)
(2)
(3)
(3)
0 of 1000
(1)
(10)
(190)
(1)
(2)
(7)
(1)
(1)
(3)
(4)
(89)
(100)
(1)
(752)
0 of 14
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(5)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(4)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(2)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(3)
(1)
(1)
(1)
(1)
(1)
(1)
(10)
(1)
(1)
(1)
(1)
(1)
(2)
(2)
(1)
(1)
(3)
(2)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(7)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(4)
(2)
(13)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(11)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(3)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(2)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(4)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(21)
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(3)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(6)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(3)
(1)
(1)
(1)
(1)
(3)
(1)
(1)
(1)
(1)
(1)
(2)
(10)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(6)
(4)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(3)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(2)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(3)
(3)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(2)
(2)
(1)
(1)
(1)
(2)
(1)
(3)
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(3)
(2)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
0 of 561
(2)
0 of 1
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(4)
(1)
(6)
(2)
(1)
(7)
(2)
(18)
(2)
(1)
(5)
(4)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(2)
(1)
(1)
(4)
(1)
(1)
(1)
(3)
(1)
(1)
(2)
(9)
(3)
(3)
(13)
(10)
(6)
(1)
(1)
(4)
(1)
(18)
(7)
(1)
(1)
(2)
(2)
(3)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(3)
(1)
(1)
(1)
(1)
(3)
(3)
(2)
(1)
(2)
(1)
(3)
(5)
(1)
(359)
(2)
(1)
(2)
(1)
(1)
(1)
(3)
(1)
(2)
(1)
(1)
(3)
(2)
(1)
(1)
(2)
(2)
(7)
(1)
(1)
(1)
(2)
(8)
(4)
(1)
(1)
(5)
(1)
(1)
(4)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(3)
(1)
(2)
(3)
(1)
(2)
(1)
(1)
(1)
(2)
(1)
(1)
(2)
(1)
(1)
(11)
(1)
(1)
(2)
(3)
(1)
(1)
(2)
(1)
(4)
(1)
(3)
(1)
(34)
(2)
(4)
(2)
(4)
(1)
(3)
(1)
(10)
(9)
(4)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(2)
(2)
(1)
(2)
(1)
(21)
(1)
(1)
(1)
(1)
(2)
(1)
(16)
(114)
(3)
(3)
(2)
(12)
(1)
(1)
(1)
(1)
(113)
(1)
(1)
(2)
(15)
(2)
(1)
(5)
(58)
(1)
(48)
(2)
(1)
(1)
(10)
(2)
(1)
(2)
(1)
(2)
(1)
(1)
(1)
(54)
(1)
(15)
(25)
(21)
(6)
(1)
(1)
(1)
(1)
(1)
(2)
(4)
(1)
(1)
(1)
(1)
(1)
(8)
(4)
(3)
(1)
(4)
(1)
(2)
(1)
(1)
(1)
(2)
(2)
(1)
(1)
(2)
(1)
(1)
(1)
(5)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(2)
(1)
(12)
(3)
(1)
0 of 294
(50)
(1)
(1)
(1)
(15)
(1)
(28)
(1)
(1)
(4)
(2)
(3)
(1)
(1)
(2)
(1)
(2)
(1)
(1)
(1)
(555)
(1)
(9)
(1)
(133)
(56)
(1)
(2)
(3)
(1)
(1)
(1)
(3)
(3)
(1)
(3)
(86)
(58)
(8)
(20)
(155)
(1)
(1)
(1)
(1)
(1)
(1)
0 of 47
(2)
(2)
(3)
(2)
(2)
(4)
(9)
(2)
(2)
(3)
(4)
(4)
(5)
(2)
(5)
(3)
(10)
(3)
(6)
(2)
(2)
(4)
(2)
(2)
(2)
(4)
(3)
(2)
(4)
(5)
(5)
(4)
(2)
(14)
(21)
(4)
(2)
(5)
(4)
(3)
(2)
(3)
(2)
(8)
(2)
(9)
(2)
(10)
(2)
(3)
(4)
(5)
(2)
(4)
(7)
(2)
(5)
(2)
(7)
(2)
(2)
(9)
(2)
(3)
(5)
(2)
(3)
(25)
(5)
(6)
(12)
(3)
(4)
(3)
(4)
(8)
(5)
(3)
(38)
(3)
(2)
(2)
(2)
(3)
(4)
(3)
(20)
(2)
(2)
(4)
(2)
(13)
(17)
(3)
(2)
(2)
(3)
(4)
(2)
(2)
(4)
(2)
(2)
(9)
(16)
(8)
(5)
(2)
(5)
(11)
(5)
(3)
(3)
(22)
(3)
(9)
(2)
(2)
(2)
(2)
(2)
(12)
(3)
(26)
(7)
(3)
(5)
(2)
(2)
(2)
(4)
(3)
(2)
(3)
(2)
(2)
(13)
(3)
(2)
(2)
(5)
(2)
(2)
(2)
(4)
(2)
(11)
(5)
(2)
(2)
(5)
(52)
(2)
(2)
(2)
(3)
(3)
(11)
(3)
(8)
(21)
(2)
(6)
(6)
(2)
(5)
(2)
(9)
(2)
(2)
(4)
(11)
(2)
(6)
(4)
(2)
(3)
(2)
(2)
(11)
(6)
(12)
(2)
(2)
(6)
(2)
(2)
(2)
(5)
(11)
(2)
(7)
(3)
(6)
(3)
(5)
(7)
(7)
(2)
(8)
(2)
(14)
(15)
(2)
(24)
(3)
(2)
(3)
(34)
(2)
(9)
(5)
(4)
(5)
(19)
(5)
(2)
(11)
(3)
(2)
(36)
(10)
(8)
(2)
(2)
(4)
(5)
(3)
(40)
(3)
(16)
(120)
(4)
(2)
(2)
(3)
(6)
(2)
(3)
(3)
(5)
(4)
(4)
(2)
(3)
(12)
(6)
(22)
(2)
(10)
(3)
(3)
(2)
(2)
(2)
(2)
(5)
(2)
(18)
(3)
(3)
(20)
(5)
(11)
(2)
(3)
(2)
(5)
(32)
(30)
(2)
(4)
(12)
(13)
(4)
(6)
(2)
(3)
(5)
(4)
(2)
(2)
(3)
(5)
(2)
(4)
(3)
(2)
(2)
(4)
(15)
(4)
(3)
(3)
(2)
(2)
(2)
(3)
(2)
(2)
(3)
(3)
(2)
(5)
(5)
(3)
(3)
(10)
(2)
(2)
(6)
(5)
(18)
(6)
(7)
(11)
(16)
(2)
(17)
(8)
(2)
(3)
(3)
(5)
(2)
(2)
(6)
(2)
(13)
(5)
(4)
(2)
(2)
(4)
(3)
(2)
(2)
(2)
(2)
(2)
(2)
(2)
(2)
(3)
(2)
(4)
(2)
(15)
(3)
(2)
(2)
(3)
(2)
(2)
(7)
(4)
(2)
(2)
(2)
(2)
(12)
(2)
(2)
(3)
(11)
(4)
(2)
(2)
(4)
(2)
(2)
(2)
(6)
(2)
(12)
(2)
(2)
(3)
(2)
(2)
(2)
(2)
(3)
(3)
(2)
(3)
(8)
(25)
(19)
(2)
(2)
(3)
(7)
(19)
(10)
(6)
(3)
(35)
(5)
(19)
(25)
(6)
(2)
(2)
(7)
(4)
(10)
(7)
(4)
(9)
(2)
(4)
(32)
(5)
(13)
(3)
(92)
(6)
(2)
(4)
(8)
(2)
(2)
(6)
(2)
(2)
(2)
(4)
(6)
(4)
(2)
(9)
(2)
(5)
(2)
(2)
(3)
(2)
(8)
(5)
(6)
(2)
(3)
(18)
(7)
(10)
(2)
(3)
(2)
(36)
(2)
(2)
(35)
(13)
(6)
(2)
(10)
(4)
(2)
(4)
(4)
(10)
(2)
(2)
(10)
(2)
(2)
(5)
(4)
(11)
(2)
(10)
(2)
(4)
(10)
(8)
(2)
(34)
(2)
(8)
(5)
(9)
(13)
(3)
(4)
(4)
(56)
(3)
(6)
(5)
(3)
(4)
(4)
(3)
(4)
(3)
(6)
(3)
(3)
(4)
(5)
(6)
(3)
(3)
(3)
(43)
(79)
(3)
(4)
(3)
(3)
(4)
(3)
(3)
(7)
(13)
(10)
(14)
(4)
(10)
(83)
(4)
(10)
(18)
(3)
(5)
(5)
(3)
(3)
(5)
(4)
(8)
(3)
(11)
(5)
(7)
(4)
(82)
(6)
(3)
(3)
(3)
(10)
(19)
(3)
(46)
(8)
(4)
(5)
(14)
(3)
(11)
(3)
(4)
(3)
(11)
(5)
(4)
(4)
(4)
(5)
(6)
(4)
(4)
(22)
(10)
(3)
(3)
(4)
(5)
(5)
(4)
(3)
(14)
(3)
(4)
(4)
(5)
(4)
(3)
(3)
(10)
(5)
(4)
(8)
(4)
(4)
(3)
(5)
(14)
(7)
(4)
(4)
(5)
(26)
(4)
(6)
(4)
(101)
(5)
(3)
(13)
(4)
(3)
(18)
(27)
(3)
(3)
(10)
(4)
(32)
(5)
(6)
(4)
(3)
(5)
(4)
(5)
(3)
(4)
(22)
(11)
(16)
(4)
(4)
(3)
(13)
(4)
(3)
(3)
(6)
(3)
(5)
(17)
(3)
(3)
(11)
(3)
(3)
(3)
(3)
(3)
(5)
(4)
(4)
(8)
(8)
(3)
(16)
(4)
(3)
(20)
(12)
(9)
(4)
(10)
(15)
(3)
(10)
(7)
(3)
(65)
(4)
(3)
(5)
(5)
(12)
(3)
(3)
(5)
(5)
(58)
(3)
(3)
(7)
(3)
(22)
(5)
(12)
(11)
(3)
(17)
(4)
(4)
(3)
(3)
(4)
(4)
(5)
(3)
(4)
(3)
(10)
(5)
(73)
(9)
(3)
(3)
(8)
(7)
(9)
(4)
(23)
(3)
(6)
(4)
(3)
(9)
(21)
(3)
(22)
(6)
(31)
(3)
(3)
(3)
(4)
(4)
(73)
(6)
(3)
(3)
(10)
(3)
(3)
(5)
(6)
(4)
(5)
(4)
(24)
(3)
(12)
(5)
(75)
(17)
(76)
(6)
(4)
(6)
(9)
(3)
(10)
(10)
(137)
(7)
(192)
(3)
(302)
(3)
(8)
(6)
(7)
(4)
(34)
(130)
(10)
(10)
(4)
(55)
(56)
(7)
(17)
(15)
(7)
(6)
(4)
(5)
(5)
(11)
(4)
(22)
(10)
(8)
(5)
(3)
(11)
(30)
(8)
(18)
(3)
(9)
(3)
(3)
(3)
(3)
(8)
(13)
(5)
(6)
(17)
(28)
(3)
(3)
(5)
(3)
(4)
(32)
(3)
(45)
(3)
(65)
(8)
(9)
(41)
(23)
(4)
(5)
(6)
(3)
(7)
(19)
(7)
(8)
(7)
(13)
(3)
(10)
(3)
(3)
(13)
(3)
(6)
(17)
(3)
(3)
(3)
(6)
(9)
(3)
(17)
(3)
(7)
(3)
(3)
(4)
(57)
(12)
(13)
(7)
(10)
(3)
(3)
(8)
(4)
(13)
(18)
(10)
(3)
(3)
(3)
(3)
(4)
(3)
(5)
(26)
(5)
(7)
(3)
(20)
(17)
(7)
(3)
(4)
(11)
(5)
(3)
(4)
(14)
(22)
(6)
(4)
(3)
(3)
(3)
(9)
(3)
(13)
(3)
(12)
(5)
(3)
(5)
(3)
(3)
(5)
(3)
(7)
(3)
(9)
(95)
(4)
(12)
(12)
(4)
(7)
(10)
(5)
(4)
(3)
(30)
(4)
(7)
(14)
(3)
(3)
(5)
(8)
(4)
(3)
(3)
(3)
(6)
(3)
(4)
(7)
(9)
(6)
(4)
(4)
(6)
(9)
(4)
(4)
(3)
(4)
(28)
(3)
(23)
(4)
(13)
(12)
(4)
(26)
(3)
(5)
(3)
(10)
(5)
(7)
(7)
(24)
(3)
(7)
(8)
(29)
(11)
(4)
(10)
(5)
(5)
(4)
(3)
(3)
(23)
(5)
(3)
(25)
(4)
(9)
(3)
(3)
(19)
(4)
(8)
(3)
(4)
(3)
(4)
(3)
(5)
(15)
(8)
(8)
(4)
(3)
(4)
(6)
(6)
(3)
(3)
(7)
(8)
(19)
(9)
(3)
(3)
(4)
(4)
(5)
(11)
(5)
(5)
(9)
(3)
(3)
(7)
(3)
(18)
(3)
0 of 1000
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(3)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(4)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(4)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
0 of 1000
Showing 481 - 500 of 1162 results
  • The Federal Railroad Administrations LiDARBased Automated Grade Crossing Survey System Research Results
    The Federal Railroad Administration's LiDAR-Based Automated Grade Crossing Survey System: Research Results
    Omar, Tarek
    2016-08-01 | PDF
    As part of the Federal Railroad Administration's (FRA's) mission to improve public safety, FRA is focused on reducing train-on-vehicle collisions at grade crossings and resulting fatalities. A fullsize track inspection vehicle with an automated detection system can help achieve this goal by surveying grade crossings in terms of the grade crossing's ...
  • Evaluation of the Federal Railroad Administrations Autonomous Track Geometry Measurement System Research and Development Program
    Evaluation of the Federal Railroad Administration’s Autonomous Track Geometry Measurement System Research and Development Program
    Morell, Jonathan
    2016-08-01 | PDF
    This report evaluates the Autonomous Track Geometry Measurement System (ATGMS). It examines: 1) the extent of ATGMS usage, 2) what railroads think of ATGMS, 3) why ATGMS is not being employed more, 4) ATGMS performance indicators, 5) how to evaluate the impact of ATGMS, and 6) establishing research priorities to increase ATGMS adoption. Data was ga ...
  • Highspeed rail turnout literature review final report
    High-speed rail turnout literature review : final report.
    Shu, Xinggao ;
    Davis, David
    2016-08-01 | PDF
    High-speed rail (HSR) turnout design criteria generally address unbalanced lateral acceleration or cant deficiency (CD), cant deficiency change rate (CDCR), and entry and exit jerk. Various countries have adopted different design values for their HSR systems based on their unique experiences and operating conditions. The design criteria (e.g., one ...
  • Linear friction welding for constructing and repairing rail for high speed and intercity passenger service rail final report
    Linear friction welding for constructing and repairing rail for high speed and intercity passenger service rail : final report.
    Shira, Seth
    2016-08-01 | PDF
    This project developed a solid-state welding process based on linear friction welding (LFW) technology. While resistance flash welding orthermite techniques are tried and true methods for joining rails and performing partial rail replacement repairs, large heat inputs and residualstresses (associated with rail shortening) can degrade the performanc ...
  • Probability of detection evaluation results for railroad tank car nondestructive testing final report
    Probability of detection evaluation results for railroad tank car nondestructive testing : final report.
    Archuleta, Megan ;
    Poudel, Anish
    2016-08-01 | PDF
    The Federal Railroad Administration (FRA), Transportation Technology Center, Inc. (TTCI), and rail industry participants haveperformed probability of detection (POD) assessments to evaluate nondestructive testing (NDT) technologies, which areprescribed by Title 49 of the Code of Federal Regulations, on butt welds and fillet welds regularly used in ...
  • Probability of detection evaluation results for railroad tank cars final report
    Probability of detection evaluation results for railroad tank cars : final report.
    Archuleta, Megan ;
    Poudel, Anish
    2016-08-01 | PDF
    The Transportation Technology Center, Inc. (TTCI) used the approach developed for the National Aeronautics and SpaceAssociation to determine the probability of detection (POD) for various nondestructive test (NDT) methods used during inspectionof railroad tank cars. The Federal Railroad Administration and TTCI, along with industry participation, ha ...
  • Geothermal switch heater installation testing and monitoring phases 1 2
    Geothermal switch heater installation, testing and monitoring : phases 1 & 2.
    Basye, Colin
    2016-07-01 | PDF
    Transportation Technology Center, Inc. (TTCI), Norfolk Southern (NS), and John A. Volpe National Transportation Systems Center (Volpe) completed Phases 1 and 2 of a project on a working prototype geothermal switch heating system designed to test the concept and efficiency of using low-temperature geothermal energy (55°F) to heat a railroad switch p ...
  • LNG safety assessment evaluation methods task 3 letter report
    LNG safety assessment evaluation methods : task 3 letter report.
    LaFleur, Angela Chris ;
    Groth, Katrina M.
    2016-07-01 | PDF
    Sandia National Laboratories evaluated published safety assessment methods across a variety of industries including Liquefied Natural Gas (LNG), hydrogen, land and marine transportation, as well as the US Department of Defense (DOD). All the methods were evaluated for their potential applicability for use in the LNG railroad application. After revi ...
  • Advanced component testing Kaskasia handbrake test
    Advanced component testing: Kaskasia handbrake test
    Carter, Daniel L.
    2016-07-01 | PDF
    The evaluation of a prototype remote operation handbrake showed that it can be installed on a car with only minor modifications to connect the air. This prototype did not set the emergency during any of the testing performed. The operation of the prototype worked as specified by the manufacturer.
  • Engineering design for pedestrian safety at highwayrail grade crossings
    Engineering design for pedestrian safety at highway-rail grade crossings
    Thompson, Alison ;
    Kennedy, Bernard J
    2016-07-01 | PDF
    A number of pedestrian treatments at railroad grade crossings have been developed and are used throughout the United States. The decision of when to use these treatments is generally a matter of best practices, using a decision tree, or conducting a siteassessment. There has been little research on the efficacy of particular treatments. More import ...
  • Providing wireless bandwidth for highspeed rail operations final report
    Providing wireless bandwidth for high-speed rail operations : final report.
    Wijesekera, Duminda ;
    Bandara, Damindra
    2016-07-01 | PDF
    This project examined the possibility of providing wireless communication for train control systems on American high-speed trains. In thisstudy, the key issue is that the frequencies allocated for rail operations in the U.S. and the frequencies used by GSM-R in other parts of the worldhave different capabilities. In Europe, GSM-R is transmitted ove ...
  • Characterization of Track Substructure Using Falling Weight Deflectometer and Automatic Ballast Sampling Research Results
    Characterization of Track Substructure Using Falling Weight Deflectometer and Automatic Ballast Sampling: Research Results
    Maal, Luis ;
    Carr, Gary
    2016-06-15 | PDF
    Transportation Technology Center, Inc. (TTCI) tested a falling weight deflectometer (FWD) diagnostic apparatus and verified it using automatic ballast sampling (ABS). The company examined the ability of the apparatus to measure track substructure characteristics by determining shear wave speed and deflection signatures for various substructure soil ...
  • The use of air bags for mitigating grade crossing and trespass accidents literature review and research plan
    The use of air bags for mitigating grade crossing and trespass accidents : literature review and research plan.
    Merkle, Andrew C. ;
    Harrigan, Timothy P.
    2016-06-01 | PDF
    This literature review will confirm prior work in the use of locomotive airbag technologies for vehicle or pedestrian collision mitigation, and to focus planned activities and tasks for this research. The state of the art in relevant technologies has been summarized to assess the feasibility of this technology and identify critical model challenges ...
  • Installation of active noise control and active vibration control on a GP402 locomotive final report
    Installation of active noise control and active vibration control on a GP40-2 locomotive : final report.
    Maguire, Daniel J. ;
    Luna, Steve
    2016-06-01 | PDF
    This project evaluated the performance of active noise control (ANC) and active vibration control (AVC) technologies using a GP40-2 locomotive located at the Transportation Technology Center (TTC) near Pueblo, CO, to determine the applicability of ANC and AVC technologies in the rail industry. Transportation Technology Center, Inc., provided suppor ...
  • Improved quality truck castings final report
    Improved quality truck castings : final report.
    Carter, Daniel ;
    Gonzales, Kari
    2016-06-01 | PDF
    A review of the car repair billing database shows that many bolsters and side frames are removed from service each year due tocracking or breaking. Derailment-related costs due to bolster and side frame failures total approximately $9 million per year.Although the number of removals may not be large in comparison to other components, the cost assoc ...
  • Prototype next generation frog foundation preliminary evaluation research results
    Prototype next generation frog foundation - preliminary evaluation : research results.
    United States. Department of Transportation. Federal Railroad Administration
    2016-06-01 | PDF
    Conventional wisdom suggests that a solid or rigid one-piece frog is preferred because it is easy to maintain. However, testing and subsequent modeling demonstrated that a flexible frog (i.e., a two-piece frog split in the flangeway) produced significantly lower maximum vertical forces with the same heavy axle load traffic. In this phase of the pro ...
  • Ballast degradation characterized through triaxial test research results
    Ballast degradation characterized through triaxial test : research results.
    Maal, Luis ;
    Carr, Gary
    2016-06-01 | PDF
    Transportation Technology Center, Inc. (TTCI)has supported the development of a large-scaletriaxial test device (Figure 1) for testing ballastsize aggregate materials at the University ofIllinois at Urbana-Champaign (UIUC). This newtest equipment uses monotonic compressionand repeated load testing to characterize shearstrength, resilient modulus, a ...
  • Validating electromagnetic walking stick rail surface crack measuring systems final report
    Validating electromagnetic walking stick rail surface crack measuring systems : final report.
    Magel, Eric E.
    2016-06-01 | PDF
    A series of field studies were undertaken to evaluate electromagnetic walking stick systems and their ability to measure the depthof damage from surface breaking cracks. In total, four railroads, and four suppliers participated in the project. The walking stickswere able to determine whether cracks are present and, after multiple runs, whether crac ...
  • Heavy point frog performance under passenger vehicles final report
    Heavy point frog performance under passenger vehicles : final report.
    Rakoczy, Anna M. ;
    Shu, Xinggao
    2016-06-01 | PDF
    Federal Railroad Administration contracted with the Transportation Technology Center, Inc., Pueblo, Colorado, to conduct aninvestigation of passenger vehicle performance running through heavy point frog (HPF) up to speeds of 110 mph. A NUCARS®simulation study was performed with various conditions of the track and vehicle systems, and for each case ...
  • Nextgeneration foundations for special trackwork phase III final report
    Next-generation foundations for special trackwork phase III : final report.
    Davis, David ;
    Jimenez, Rafael
    2016-05-01 | PDF
    Transportation Technology Center, Inc. (TTCI) conducted a series of tests, funded by the Federal Railroad Administration, which evaluated the potential beneficial effects of various configurations of high angle frogs and frog foundations on wheel-rail vertical forces and frog performance. The tests were conducted under 315,000-pound cars with nomin ...
481 - 500 / 1162