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.

Transportation Resilience and Vulnerability Collection

rosaP Repository & Open Science Access Portal

The Transportation Resilience & Vulnerability Collection is a curated selection of information on transportation infrastructure, resilience, and vulnerability issues. Bookmark this collection: https://rosap.ntl.bts.gov/collection_tccc or https://doi.org/10.21949/1530826.

(29)
(29)
(11)
(13)
(13)
(21)
(37)
(31)
(34)
(33)
(48)
(28)
(24)
(25)
(30)
(42)
(56)
(44)
(7)
(4)
(3)
(3)
(4)
(2)
(2)
(6)
(9)
(7)
(15)
(6)
(2)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
0 of 38
(1)
(1)
(2)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(3)
(5)
(1)
(2)
(3)
(1)
(1)
(1)
(1)
(2)
(1)
(2)
(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)
(2)
(1)
(1)
(2)
(1)
(4)
(1)
(1)
(1)
(1)
(1)
(4)
(1)
(1)
(2)
(2)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(3)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(3)
(3)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(3)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(3)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(2)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(2)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(5)
(1)
(1)
(1)
(5)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(3)
(1)
(3)
(2)
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(2)
(1)
(8)
(2)
(1)
(1)
(1)
(1)
(1)
(2)
(3)
(2)
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(3)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(2)
(2)
(1)
(1)
(1)
(1)
(2)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(2)
(2)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(2)
(2)
(2)
(1)
(3)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(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)
(2)
(1)
(1)
(1)
(3)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(2)
(1)
(2)
(2)
(1)
(1)
(3)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(2)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(3)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(4)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(2)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(3)
(1)
(2)
(1)
(1)
(2)
(1)
(1)
(3)
(2)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(3)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(3)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(4)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(2)
(3)
(3)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(3)
(3)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(2)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(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)
(3)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(3)
(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)
(2)
(7)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(2)
(1)
(1)
(1)
(4)
(3)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(4)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(3)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(3)
(1)
(1)
(4)
(1)
(1)
(1)
(4)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(2)
(3)
(1)
(2)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(3)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(2)
(1)
(1)
(2)
(1)
(1)
(2)
(1)
(1)
(2)
(2)
(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)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(3)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(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)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(6)
(2)
(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)
0 of 1000
(1)
(65)
(3)
(11)
(9)
(1)
(1)
(1)
(5)
(14)
(17)
(159)
(338)
(1)
0 of 14
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(3)
(1)
(1)
(1)
(2)
(1)
(3)
(1)
(2)
(7)
(1)
(1)
(9)
(1)
(3)
(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)
(2)
(1)
(1)
(1)
(2)
(1)
(2)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(2)
(1)
(1)
(1)
(2)
(6)
(4)
(4)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(3)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(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)
(3)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(6)
0 of 152
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(4)
(3)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(3)
(1)
(1)
(4)
(4)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(4)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(3)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(3)
(1)
(2)
(1)
(1)
(4)
(1)
(2)
(1)
(1)
(1)
(3)
(1)
(1)
(1)
(1)
(1)
(1)
(16)
(1)
(1)
(2)
(2)
(2)
(1)
(51)
(1)
(1)
(6)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(6)
(2)
(2)
(7)
(1)
(1)
(1)
(1)
(9)
(1)
(1)
(1)
(1)
(1)
(1)
(22)
(1)
(1)
(1)
(2)
(2)
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(2)
(3)
(1)
(1)
(5)
(5)
(2)
(2)
(2)
(1)
(3)
(1)
(2)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(14)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(3)
(3)
(1)
(1)
(1)
(4)
(1)
(1)
(3)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(2)
(2)
(1)
(1)
(1)
(1)
(11)
(2)
(2)
(1)
(10)
(1)
(16)
(9)
(2)
(2)
(3)
(1)
(2)
(1)
(26)
(1)
(1)
(7)
(16)
(1)
(1)
(1)
(45)
(1)
(1)
(51)
(2)
(1)
(1)
(2)
(1)
(1)
(7)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(2)
(19)
(1)
(2)
(2)
(1)
(2)
(2)
(2)
(2)
(1)
(1)
(2)
(1)
(3)
(2)
(1)
(1)
(1)
(1)
(3)
(1)
(1)
(1)
(3)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(3)
(1)
(1)
(1)
(1)
(2)
(2)
(1)
(1)
(6)
(1)
(2)
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(26)
(1)
0 of 310
(1)
(1)
(4)
(1)
(1)
(4)
(1)
(4)
(2)
(1)
(1)
(1)
(4)
(1)
(25)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(4)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(2)
(1)
(1)
(1)
(2)
(2)
(2)
(11)
(2)
(1)
(1)
(1)
(2)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(2)
(2)
(25)
(1)
(1)
(12)
(1)
(1)
(1)
(2)
(2)
(3)
(6)
(1)
(1)
(2)
(15)
(1)
(1)
(1)
(1)
(2)
(3)
(24)
(1)
(2)
(3)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(2)
(1)
(1)
(2)
(1)
(1)
(1)
(3)
(3)
(2)
(1)
(2)
(1)
(3)
(3)
(2)
(2)
(1)
(1)
(6)
(4)
(1)
(1)
(1)
(2)
(1)
(7)
(2)
(1)
(1)
(4)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(3)
(3)
(1)
(1)
(1)
(1)
(2)
(1)
(4)
(1)
(2)
(47)
(3)
(8)
(3)
(1)
(22)
(1)
(51)
(1)
(2)
(4)
(15)
(1)
(3)
(2)
(2)
(1)
(1)
(1)
(1)
(9)
(8)
(1)
(1)
(2)
(2)
(55)
(1)
(2)
(1)
(3)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(11)
(3)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(3)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(5)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(2)
(1)
0 of 210
(1)
(1)
(3)
(1)
(1)
(1)
(7)
(2)
(1)
(1)
(1)
(1)
(1)
(2)
(2)
(1)
(1)
(4)
(1)
(1)
(2)
(1)
(18)
(1)
(3)
(1)
(1)
(1)
(36)
(3)
(1)
(2)
(1)
(2)
(3)
(5)
(2)
(3)
(1)
(1)
(1)
(6)
(74)
(34)
(2)
(1)
(1)
(1)
(1)
(3)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(32)
(1)
(7)
(1)
(7)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(9)
(1)
(1)
(1)
(1)
(15)
(1)
(1)
(2)
(4)
(3)
(1)
(1)
(1)
(1)
(3)
(1)
(1)
(1)
(3)
(8)
(2)
(1)
(1)
(20)
(1)
(1)
(7)
(1)
(1)
(1)
(3)
(3)
(2)
(9)
(2)
(1)
(1)
(13)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(4)
(1)
(16)
(1)
(1)
(1)
(3)
(2)
(1)
(1)
(13)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(6)
(1)
(2)
(28)
(2)
(1)
(1)
(2)
(8)
(1)
(1)
(7)
(1)
(1)
(1)
(1)
(1)
(23)
(1)
(1)
(1)
(2)
(4)
(2)
(1)
(1)
(1)
(1)
(26)
(537)
(3)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(5)
(1)
(2)
(2)
(1)
(1)
(1)
(1)
(3)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(4)
(1)
(8)
(1)
(1)
(6)
(1)
(4)
(2)
(10)
(1)
(1)
(2)
(3)
(1)
(1)
(5)
(2)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(2)
(1)
(1)
(2)
(2)
(1)
(5)
(2)
(1)
(2)
(2)
(3)
(2)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(3)
(2)
(2)
(2)
(3)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(2)
(6)
(1)
(13)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(2)
(1)
(1)
(1)
(1)
(4)
(8)
(1)
(1)
(2)
(22)
(2)
(1)
(1)
(1)
(1)
(1)
(2)
(4)
(6)
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(2)
(1)
(2)
(3)
(1)
(2)
(1)
(2)
(2)
(2)
(1)
(1)
(1)
(2)
(9)
(1)
(2)
(65)
(5)
(7)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(4)
(2)
(2)
(1)
(1)
(1)
(3)
(1)
(3)
(1)
(18)
(1)
(1)
(2)
(1)
(1)
(7)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(2)
(2)
(1)
(1)
(1)
(1)
(1)
(2)
(2)
(1)
(1)
(3)
(1)
(4)
(1)
(1)
(3)
(13)
(1)
(3)
(1)
(2)
(1)
(2)
(3)
(3)
(5)
(2)
(1)
(17)
(4)
(1)
(20)
(1)
(1)
(1)
(1)
(47)
(12)
(1)
(20)
(3)
(1)
(4)
(1)
(1)
(3)
(1)
(1)
(2)
(1)
(3)
(4)
(1)
(2)
(2)
(1)
(1)
(1)
(28)
(5)
(1)
(1)
(25)
(67)
(2)
(1)
(3)
(3)
(1)
(5)
(28)
(1)
(11)
(6)
(1)
(9)
(1)
(1)
(8)
(16)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(3)
(1)
(4)
(5)
(1)
(1)
(1)
(5)
(90)
(6)
(2)
(1)
(1)
(1)
(1)
(3)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(3)
(1)
(3)
(1)
(1)
(2)
(2)
(1)
(2)
(1)
(1)
(2)
(1)
(5)
(1)
(2)
(1)
(1)
(3)
(5)
(1)
(1)
(1)
(1)
(1)
(3)
(2)
(43)
(1)
(1)
(56)
(3)
(11)
(1)
(1)
(2)
(1)
(5)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(8)
(1)
(14)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(2)
(2)
(5)
(26)
(1)
(1)
(1)
(1)
(1)
(5)
(2)
(4)
(1)
(9)
(1)
(8)
(1)
(4)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(2)
(1)
(103)
(1)
(3)
(4)
(1)
(88)
(3)
(1)
(2)
(168)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(2)
(2)
(1)
(1)
(2)
(4)
(1)
(38)
(1)
(1)
(1)
(5)
(1)
(4)
(4)
(2)
(2)
(1)
(1)
(1)
(1)
(1)
(6)
(2)
(1)
(2)
(1)
(2)
(3)
(2)
(1)
(1)
(2)
(1)
(54)
(1)
(2)
(2)
(1)
(5)
(1)
(1)
(1)
(4)
(1)
(1)
(1)
(1)
(3)
(3)
(3)
(1)
(1)
(2)
(4)
(1)
(1)
(1)
(2)
(3)
(1)
(9)
(1)
(3)
(6)
(1)
(1)
(1)
(2)
(1)
(6)
(3)
(5)
(2)
(5)
(1)
(1)
(1)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(40)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(3)
(1)
(1)
(2)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(2)
(1)
(1)
(2)
(1)
(1)
(1)
(2)
(5)
(2)
(1)
(1)
(6)
(2)
(1)
(1)
(1)
(1)
(3)
(1)
(10)
(1)
(13)
(2)
(3)
(13)
(3)
(1)
(1)
(1)
(3)
(1)
(1)
(6)
(2)
(1)
(18)
(1)
(1)
(3)
(1)
(4)
(1)
(2)
(2)
(2)
(1)
(2)
(1)
(7)
(3)
(2)
(7)
(3)
(2)
(2)
(2)
(5)
(2)
(2)
(3)
(2)
(2)
(4)
(2)
(7)
(2)
(3)
(3)
(8)
(2)
(3)
(16)
(2)
(3)
(4)
(2)
(2)
(6)
(2)
(3)
(2)
(5)
(3)
(2)
(2)
(2)
(2)
(7)
(3)
(3)
(2)
(2)
(4)
(6)
(2)
(3)
(2)
(3)
(3)
(6)
(6)
(2)
(2)
(2)
(2)
(3)
(6)
(2)
(8)
(5)
(3)
(26)
(5)
(17)
(12)
(2)
(27)
(3)
(4)
(13)
(34)
(54)
(3)
(33)
(3)
(22)
(7)
(2)
(2)
(2)
(2)
(2)
(2)
(2)
(2)
(6)
(26)
(4)
(2)
(2)
(4)
(3)
(2)
(6)
(5)
(3)
(2)
(2)
(8)
(4)
(3)
(10)
(3)
(12)
(3)
(17)
(5)
(10)
(2)
(5)
(5)
(5)
(4)
(2)
(2)
(2)
(17)
(55)
(2)
(4)
(6)
(2)
(2)
(2)
(3)
(4)
(9)
(3)
(3)
(3)
(2)
(3)
(2)
(48)
(2)
(6)
(5)
(3)
(3)
(2)
(4)
(6)
(2)
(3)
(5)
(2)
(2)
(2)
(2)
(2)
(2)
(3)
(2)
(7)
(5)
(2)
(14)
(3)
(3)
(6)
(15)
(37)
(24)
(8)
(2)
(3)
(3)
(10)
(2)
(26)
(117)
(4)
(6)
(2)
(34)
(2)
(6)
(2)
(2)
(2)
(2)
(4)
(6)
(6)
(4)
(2)
(13)
(4)
(3)
(2)
(3)
(8)
(2)
(2)
(3)
(138)
(2)
(11)
(7)
(3)
(8)
(2)
(2)
(9)
(12)
(2)
(5)
(5)
(2)
(12)
(2)
(2)
(3)
(2)
(8)
(3)
(5)
(2)
(2)
(2)
(7)
(4)
(2)
(2)
(8)
(2)
(2)
(2)
(2)
(13)
(3)
(2)
(3)
(2)
(2)
(2)
(4)
(2)
(7)
(2)
(6)
(12)
(14)
(2)
(2)
(23)
(2)
(2)
(2)
(2)
(7)
0 of 1000
(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)
(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)
(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)
(1)
(1)
(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)
(2)
(1)
(1)
(1)
(1)
(2)
(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)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(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)
0 of 371
Showing 581 - 600 of 626 results
  • Linking Transportation and Air Quality Planning Implementation of the Transportation Conformity Regulations in 15 Nonattainment Areas
    Linking Transportation and Air Quality Planning: Implementation of the Transportation Conformity Regulations in 15 Nonattainment Areas
    Howitt, Arnold M. ;
    Moore, Elizabeth M.
    1999-07-01 | PDF
    The Clean Air Act Amendments (CAAA) of 1990 require far-reaching efforts under the "transportation conformity" regulations to assure that transportation investments in nonattainment and maintenance areas are consistent with state commitments to meet national air pollution standards. This research documents how these regulations were implemented dur ...
  • Clean Cities Case Study Barwood Cab Fleet Study Summary
    Clean Cities Case Study: Barwood Cab Fleet Study Summary
    Whalen, P.
    1999-05-21 | PDF
    Barwood Cab Fleet Study Summary is the second in a new series called 'Alternative Fuel Information Case Studies', designed to present real-world experiences with alternative fuels to fleet managers and other industry stakeholders.
  • Federal Agency Transportation Management Program Handbook
    Federal Agency Transportation Management Program Handbook
    EDAW Inc.  ...
    1999-04-01 | PDF
    This handbook provides Federal agencies in the National Capital Region (NCR) with procedures and guidelines on how to prepare a Transportation Management Program (TMP). The preparation of TMPs is one tool in the overall field of Travel Demand Management (TDM). The general goal of TDM is to reduce the demand on existing transportation resources. The ...
  • Analysis of the Climate Change Technology Initiative
    Analysis of the Climate Change Technology Initiative
    United States. Energy Information Administration  ...
    1999-04-01 | PDF
    In February 1999, the Administration sent its fiscal year 2000 budget request to the U.S. Congress. It includes more than $4 billion in programs related to climate change. Nearly $1.8 billion of the funding is proposed for tax incentives, research and development, and other spending for the Climate Change Technology Initiative (CCTI). CCTI includes ...
  • Remote Sensing Measurements of Real World High Exhaust Emitters
    Remote Sensing Measurements of Real World High Exhaust Emitters
    McClintock, P.
    1999-03-12 | PDF
    Remote Sensing measurements were taken at five primary sites in the Denver Area between April 1997 and March 1998 using an RS2000 unit capable of measuring HC, CO, and NO. The RD unit also measures vehicle speed and acceleration to permit determination of the vehicle operating condition and captures an image of the vehicle plate for identification.
  • Linking Transportation and Air Quality Planning Implementation of the Transportation Conformity Regulations in 15 Nonattainment Areas Executive Summary
    Linking Transportation and Air Quality Planning Implementation of the Transportation Conformity Regulations in 15 Nonattainment Areas: Executive Summary
    Howitt, A.M. ;
    Moore, E.M.
    1999-03-01 | PDF
    Clean Air Act Amendments (CAAA) of 1980 requires far reaching efforts under the "transportation conformity" regulations to assure that transportation investments in non-attainment and maintenance areas are consistent with state commitments to meet national air pollution standards. This research documents how these regulations were implemented durin ...
    Supporting Files
  • Clean Air Program Cylinder Issues Associated with Alternative Fuels
    Clean Air Program: Cylinder Issues Associated with Alternative Fuels
    DeMarco, V. R.
    1999-01-01 | PDF
    A number of incidents of compressed natural gas (CNG) cylinder leaks have occurred while transit buses were either in service or at a bus maintenance facility. This study was initiated to determine the degree to which cylinder problems still exist in the field and the status of their resolution. A letter requesting information was sent to 41 transi ...
  • Modal Emissions Modeling with Real Traffic Data
    Modal Emissions Modeling with Real Traffic Data
    Crawford, J. A. ;
    Jordan, C.
    1999-01-01 | PDF
    This report details the use of a modal emissions model to estimate the relative emissions of CO due to changes in vehicle operating characteristics on urban roadways. The Davis Institute for Transportation Studies Emissions Model (DITSEM) was selected to demonstrate the emissions characteristics of different freeway operating conditions. Instrument ...
  • Assumptions to the Annual Energy Outlook 1999 With Projections to 2020
    Assumptions to the Annual Energy Outlook 1999: With Projections to 2020
    United States. Energy Information Administration
    1998-12-16 | PDF
    This paper presents the major assumptions of the National Energy Modeling System (NEMS) used to generate the projections in the Annual Energy Outlook 19991 (AEO99), including general features of the model structure, assumptions concerning energy markets, and the key input data and parameters that are most significant in formulating the model result ...
  • Measuring Concentrations of Selected Air Pollutants inside California Vehicles Final Report
    Measuring Concentrations of Selected Air Pollutants inside California Vehicles: Final Report
    Rodes, C. ;
    Sheldon, L.
    1998-12-01 | PDF
    This study provided the data needed to characterize in-transit exposures to air pollutants for California drivers. It also demonstrated a number of in-situ monitoring techniques in moving vehicles and provided findings that shed new light on particle exposure assessments and research needs. The appendices are found in the Supporting Files tab, as t ...
    Supporting Files
  • FuelCycle Greenhouse Gas Emissions Impacts of Alternative Transportation Fuels and Advanced Vehicle Technologies
    Fuel-Cycle Greenhouse Gas Emissions Impacts of Alternative Transportation Fuels and Advanced Vehicle Technologies
    Wang, M.
    1998-11-15 | PDF
    At an international conference on global warming, held in Kyoto, Japan, in December 1997, the United States committed to reduce its greenhouse gas (GHG) emissions by 7% over its 1990 level by the year 2012. To help achieve that goal, transportation GHG emissions need to be reduced. Using Argonne's fuel-cycle model, I estimated GHG emissions reducti ...
  • IMPACTT5A Model Enhancements and Modifications since December 1994 With Special Reference to the Effect of TripledFuelEconomy Vehicles on FuelCycle Energy and Emissions
    IMPACTT5A Model: Enhancements and Modifications since December 1994: With Special Reference to the Effect of Tripled-Fuel-Economy Vehicles on Fuel-Cycle Energy and Emissions
    Mintz, M. M. ;
    Saricks, C. L.
    1998-09-01 | PDF
    Version 5A of the Integrated Market Penetration and Anticipated Cost of Transportation Technologies (IMPAC'IT5A) model is a spreadsheet-based set of algorithms that calculates the effects of advanced-technology vehicles on baseline fuel use and emissions. Outputs of this Argonne National Laboratory-developed model include estimates of (1) energy us ...
  • Impact of National Airspace Systems NAS Modernization on Aircraft Emissions
    Impact of National Airspace Systems (NAS) Modernization on Aircraft Emissions
    Melone, Fran ;
    Liang, Diana
    1998-09-01 | PDF
    The study evaluated the fuel and emission benefits of Free Flight by aircraft type and phase of flight. Calculations for aircraft emissions were made for pollutants directly produced within the engine combustor and emitted at a rate depending on the temperature and thrust of the engine—in this instance, specifically for nitrogen oxides (NOx), hydro ...
  • Transportation and Sustainable Communities Initiative Overview of Federal Sustainable Transportation Activities
    Transportation and Sustainable Communities Initiative: Overview of Federal Sustainable Transportation Activities
    Green, Kevin
    1998-06-30 | PDF
    President Clinton established the National Science and Technology Council (NSTC) by Executive Order on November 23, 1993. This cabinet-level council is the principal means for the President to coordinate science, space, and technology policies across the Federal Government. Through its planning activities in 1997, the NSTC Committee on Transportati ...
  • Transportation and Global Climate Change A Review and Analysis of the Literature
    Transportation and Global Climate Change: A Review and Analysis of the Literature
    United States. Federal Highway Administration  ...
    1998-06-01 | PDF
    This report provides a discussion of the relationship between transportation and global climate change based on peer-reviewed literature and research findings, and an overview of transportation solutions. The report is organized in four primary sections: Inventories of Greenhouse Gas Emissions and Concentrations; Potential Impacts of Global Climate ...
  • Urban Airshed Modeling of Air Quality Impacts of Alternative Transportation Fuel Use in Los Angeles and Atlanta
    Urban Airshed Modeling of Air Quality Impacts of Alternative Transportation Fuel Use in Los Angeles and Atlanta
    Earth Technology, Inc.
    1997-12-01 | PDF
    This report documents a photochemical modeling study of the potential impacts on air quality of future emissions from alternative fuel vehicles (AFVs). The main objective of the National Renewable Energy Laboratory (NREL) in supporting this study is to determine the relative air quality impact of the use of compressed natural gas (CNG) as an altern ...
  • Annual Energy Outlook 1998 With Projections to 2020
    Annual Energy Outlook 1998: With Projections to 2020
    United States. Energy Information Administration
    1997-12-01 | PDF
    The analysis in AEO98 focuses primarily on a reference case and four other cases that assume higher and lower economic growth and higher and lower world oil prices than in the reference case. Forecast tables for these cases are provided in Appendixes A through C. Appendixes D and E present a summary of the reference case forecasts in units of oil e ...
  • ReviewofProceduresforEstimatingOnRoadMobileSourceEmissionsInventoriesfor1990BaseYearSIPs
    Review of Procedures for Estimating On-Road Mobile Source Emissions Inventories for 1990 Base Year SIPs
    vanderWilden, P.
    1997-11-01 | PDF
    In response to the 1990 Clean Air Act Amendments (CAAA), areas designated as being in violation of the National Ambient Air Quality Standards (NAAQS) were required to submit State Implementation Plans (SIPs) beginning with 1990 Base Year Emissions Inventories. In an effort to support the successful implementation of the CAAA and to provide support ...
  • An Overview of PM10 Base Year Emissions Inventories
    An Overview of PM-10 Base Year Emissions Inventories
    vanderWilden, P.
    1997-11-01 | PDF
    The Clean Air Act Amendments (CAAA) of 1990 required areas designated as being in violation of the National Ambient Air Quality Standards for particle matter measuring less than or equal to 10 micrometers in aerodynamic mass median diameter (PM-10) to submit State Implementation Plans (SIPs) beginning with Base Year inventories. In recent years, PM ...
  • The RoleofMotorVehicleEmissionControlsinStateImplementationPlans
    The Role of Motor Vehicle Emission Controls in State Implementation Plans
    Ostria, S. ;
    Deysher, E.
    1997-11-01 | PDF
    The Clean Air Act Amendments of 1990 (CAAA) require that states submit State Implementation Plans (SIPs) detailing strategies to improve air quality in nonattainment areas. This analysis first reviews the administrative procedures that states and the EPA must undertake to submit and approve SIPs, as well as the status of that process. Then, the ana ...
581 - 600 / 626
 Found an issue?
Send us an email at: publishinghd@cdc.gov