This can sometimes lead to embarrassing situations. (2) Arizona does not recognize Daylight Saving Time, meaning that for practical purposes the spot where the time zone change takes place shifts in the Spring and the Fall. This was described in (West) Wendover: What Time? What State? (1) West Wendover is the only part of Nevada that officially observes Mountain Time, primarily so gamblers from Salt Lake City - the nearest large town - won’t have to deal with a time change and can focus on losing their money without distraction. Cumberland Parkway: Russel Co., KY Pulaski Co., KY (11).Western Kentucky Parkway: Grayson Co., KY Hardin Co., KY (10).Interstate 10: Jackson Co., FL Gadsden Co., FL.Interstate 24: Marion Co., TN Hamilton Co., TN.Interstate 40: Cumberland Co., TN Roane Co., TN.Interstate 64: Perry Co., IN Crawford Co., IN.Interstate 65: Jasper Co., IN White Co., IN / AND/ Hart Co., KY Larue Co., KY (8).Interstate 10: Hudspeth Co., TX Culberson Co., TXĬhange Between Central Time and Eastern Time.Interstate 70: Sherman Co., KS Thomas Co., KS (5).Interstate 80: Keith Co., NE Lincoln Co., NE.Interstate 90: Jackson Co., SD Jones Co., SD.Interstate 94: Stark Co., ND Morton Co., ND.
Interstate 08: California Arizona (Standard Time) no change during DST (2) (4)Ĭhange Between Mountain Time and Central Time.Interstate 10: California Arizona (Standard Time) Arizona New Mexico (Daylight Saving Time) (2).Interstate 15: Nevada Arizona (Standard Time) Arizona Utah (Daylight Saving Time) (2).Interstate 40: California Arizona (Standard Time) Eastern Arizona SE corner of Navajo Reservation in AZ (Daylight Saving Time) (2) (3).Interstate 80: Unincorporated Elko Co., NV West Wendover, Elko Co., NV (1).Interstate 84: Baker Co., OR Malheur Co., OR.Please let me know and I’ll make corrections.Ĭhange Between Pacific Time and Mountain Time I’m sure errors or omissions crept into this because it was such a pain to compile. Now they have a tool to do that - this page. That’s why I think people have trouble tracking time zones as they drive. Some do, although many more switch at random county borders which were much more difficult to pinpoint on a map. I assumed quite foolishly that the preponderance of time changes would happen at state borders and simplify my task. Believe me, I’d use much more colorful language if this wasn’t a family-friendly website. This exercise was a lot more tedious than I imagined. Again, the rules applied in general terms only. There were also a handful of odd-numbered highways that crossed time zone boundaries too and muddied the construct a bit. Even-numbered Interstates run roughly west to east across the nation with the 2-digit numbering increasing from south to north. I didn’t reverse the order just to be obstinate. That was also the reason why Interstate numbers on the spreadsheet and the lists below were ordered from large to small (I-94 to I-8). The spreadsheet layout mimics the geographic footprint of the United States in rough terms, for example I positioned Idaho at the top-left (northwest) and Florida at the bottom-right (southeast). Others may prefer the even more detailed Google spreadsheet with links that I prepared. It’s not very useful in its present scaled down version that is included for illustrative purposes. Readers will want to open this map in another tab or window. I even collected the lat/long coordinates so travelers (OK, maybe just me…) could drop the waypoints into their GPS receivers and know exactly where time changes happen well in advance. However some of us like to be hyper-prepared before embarking on a journey. Yes, I understand that mobile phones and other networked devices grab time changes automatically without human intervention from nearby cell towers as someone drives merrily down the highway. Hopefully others will find this compact reference useful too. I didn’t see it so I decided to create my own. Maybe there’s one out there hidden away in a lonely corner of the Intertubes. I’m going to do that myself soon on my upcoming trip and I couldn’t find a comprehensive resource either. I’ve noticed a lot of search engine queries lately seeking additional information about points along US Interstate Highways where travelers cross from one time zone into another.
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