3010, a bill to establish a Department of Transportation, and for other purposes. Establish a Department of Transportation: Hearings, 89 th Congress, 2 nd session, on S. Department of transportation act: report to accompany H.R. 13200 a bill to establish a Department of Transportation and for other purposes. Creating a Department of Transportation: Hearings before a Subcommittee of the Committee on Government Operations, House of Representatives, 89 th Congress, 2 nd session, on H.R. Standard Time: We All Live By What Happened on November 18, 1883. 9 The new map in the 2019 Fall NTAD release includes these changes and showcases the most up-to-date information on standard time zones in the nation.ġ. 9 It switched from Mountain to Central Time in 2010. 8 Over the past two decades, 15 communities (counties, cities, and parts of counties) have changed their time zone boundary, the most recent being Mercer County, North Dakota. 7 Time zone boundaries are also established by law and can only be changed by the Secretary of Transportation if the adjustment is deemed to benefit commerce. 10 DST is observed uniformly across the nation with the exception of four territories and two states (Arizona and Hawaii). Today, the Department of Transportation continues to supervise standard time due to its historical and contemporary importance in transportation and associated commercial activity. 10 While the adoption of standard time was motivated by transportation improvement, DST has become more widespread for reasons of energy savings and economy. 1,4ĭaylight Savings Time (DST) is another responsibility of the Department of Transportation and has since become integral to the workings of modern society. 4 When the Department of Transportation was founded in 1966, the responsibility of regulating standardized time was transferred to it. 1 However, the need for coordination among all modes, became increasingly important after World War II. 1,5 That year, five time zones were officially adopted as the US entered World War I: the Eastern, Central, Mountain, Pacific, and Alaskan zones still in use today. 5 The federal organization in charge of railroad regulation – the Interstate Commerce Commission – was given the power to address coordination concerns in 1918. Standard time was transportation-driven and, as a result, the government coordination of time zones was handled by transportation agencies. 3 The major railroad companies as a result began to operate on a coordinated system of four time zones starting in 1883. 2 Due to this lack of time standardization, schedules on the same tracks often could not be coordinated, resulting in collisions. 2 With the proliferation of railroads, faster travel became possible across many cities and travelers could sometimes arrive at an earlier local time than the one they had left. 3 The resulting small time differences between adjacent towns and cities were not critical when it took days to travel from place to place. But that has not always been the case.īefore the establishment of time zones in 1883, there were over 144 local times in North America. 1,10 These time zones, with boundaries that have for the most part been fixed for more than a century, are taken for granted by most Americans.
and the five additional time zones used in Alaska, Hawaii and other U.S. With the 2019 Fall release of the National Transportation Atlas Database (NTAD), a new map of the nation’s time zones is featured, showing the geographical boundaries of four time zones in the continental U.S. Advisory Council on Transportation Statistics.National Transportation Knowledge Network.National Transportation Library Main - Library.Vehicle Inventory and Use Survey (VIUS).Transportation Statistics Annual Reports.Local Area Transportation Characteristics (LATCH dataset).Government Transportation Financial Statistics.Statistical Products and Data Main - Statistical 1.Transportation Maps and Geospatial Data.Introduction to Transportation Statistics.
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