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. You’ll have to deal with that manually.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. Naturally none of this will help you if you’re using an old-school watch. Other times it’s delayed or even gets stuck on the “wrong” time. Sometimes a phone grabs a cell tower right near the border and it happens quickly. Honestly, I’ve had mixed results with that alternative. Of course, another option might be to watch the time flip on your mobile phone. Or again, use the information I posted above. Although I guess someone could watch for road signs showing distance to Knoxville. It’s something like 150 miles from Nashville. That trick won’t work heading eastbound, from Central Time into Eastern Time. For something more exact, use the mile markers or coordinates I posted above.Įastbound (going from Central to Eastern Time) That’s a pretty good rule of thumb and something fairly easy to remember. So someone driving west out of Knoxville will hit Central Time about 45 minutes later, plus or minus. Knoxville is probably the closest population center, about 45 miles to the east. The Cumberland – Roane border doesn’t run near any major cities either. Otherwise nobody would ever need this page. However, I don’t know the boundaries well enough to understand intuitively where this happens. I’ve been to Tennessee plenty of times and visited many of its counties. Westbound (going from Eastern to Central Time)įor those driving along Interstate 40, the time zone boundary falls between Cumberland and Roane Counties. As a result, about a quarter of Tennessee’s counties fell into the Eastern Time Zone and three-quarters within Central Time. Logically they used a convenient basis that already existed: county structures. government had to find a way to split Tennessee. It makes no sense to keep the entire state within a single time zone. So a drive from Memphis to Kingsport stretches nearly 500 miles and takes more than 7 hours. However, Tennessee falls within an interesting geographic situation and it’s also really wide. It’s pretty apparent, for example, when someone crosses between Georgia and Alabama. Thus, it’s easy to know when the time changes. Many time zone changes in the United States happen at state borders. But it’s also a very comprehensive list and it’s a bit confusing for those looking for a single piece of information. That’s completely expected of course because the answer definitely exists there. Most of the web hits land on my phenomenally popular Interstate Highway Time Zone Crossings page. I’ve received tons of search queries recently about that exact spot. It seems like everyone wants to know where the time zone changes on I-40 in Tennessee. However, if you want more details than anyone would ever care to know, please keep reading. Thanks for stopping by and good luck on the rest of your trip! Feel free to put the phone down now and focus on driving. I’ll guess that answers the question for about 99% of you.
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