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.Freight Logistics Optimization Works (FLOW).Electric Vehicle Inventory and Use Survey (eVIUS).Statistical Products and Data Main - Statistical 1.Transportation Maps and Geospatial Data.Introduction to Transportation Statistics.Each time zone was separated by 15 degrees. Who invented the time zone? Sir Sandford Fleming developed the system in 1878 that divided the world into 24 different time zones. How long has time zones been around? The worldwide time zone system was developed in 1878. What time zones have the most states? The time zone that covers the most states is the Eastern Standard Time Zone (EST)

How many different time zones are in the US? There are six different time zones including Alaska and Hawaii. What is the latest time zone in the United States? Eastern Standard Time Zone (EST) is the latest time zone by the hour.

WA OR NV CA PACIFIC WY UT NM MT ID CO AZ MOUNTAIN WI TX TN SD OK ND NE MO MS MN LA KS IA IL AR AL CENTRAL VA VT WV SC RI PA OH NC NY NJ NH MI MA MD ME KY IN GA FL DE CT EASTERN Eastern Standard Time Zone Connecticut (CT) The other two are Alaskan Standard Time (AKST) and the Hawaii-Aleutian Standard Time (HST). However, the United States actually has six standard time zones. The most familiar four major United States time zones are Eastern Standard Time (EST), Central Standard Time (CST), Mountain Standard Time (MST), and Pacific Standard Time (PST). View the live map of US time zones below.

Us time zone map