Johnson City, TN to South Carthage, TN is 239.8 miles and takes about 4h 27m via I 40, I 81, and James H. Quillen Parkway, with a fuel budget near $37 and enough daylight to finish in a day. This drive stays entirely within Tennessee, moving from the Southeast region to another part of the Southeast. Given its relatively short duration and highway focus, this trip is well-suited for a single-day journey. You'll find yourself on major interstates for most of the way, making it a straightforward transit rather than a winding exploration. Consider this option if you need an efficient way to cover ground between these two points in the Volunteer State.
Trip Pace
Same-day drive is realistic
A same-day return is possible, but it will make for a full day on the road.
Break Rhythm
1 planned break
Plan on a short reset every 3 to 4 hours to stay fresh behind the wheel.
Midpoint
119.9 miles from Johnson City, TN
A natural place for your longest stop of the day
, about 2h 15m into the drive
.
Main Roads
Road
Distance
Duration
I 40
162.4 mi
2h 57m
I 81
57.1 mi
1h 1m
James H. Quillen Parkway
13.7 mi
16m
Gordonsville Highway
4 mi
6m
Cookeville Highway
0.7 mi
1m
East Watauga Avenue
0.3 mi
<1m
North Roan Street
0.3 mi
<1m
Buffalo Street
0.3 mi
<1m
Longest stretch:
I 40
— 162.4 mi, about 2h 57m
Turn-by-Turn Driving Directions
Step-by-step road directions between Johnson City, TN and South Carthage, TN.
1
Start on this road
433 ft·35 sec·this road
2
Turn left onto Buffalo Street
0.3 mi·56 sec·Buffalo Street
Use the straight lane.
3
Turn left onto North Roan Street
0.3 mi·36 sec·North Roan Street
Use the left lane.
4
Turn right onto SR 400
0.3 mi·45 sec·East Watauga Avenue
5
Turn left onto Oak Street
441 ft·10 sec·Oak Street
6
Take the ramp
0.2 mi·23 sec
7
Merge onto I 26; US 19W; US 23
14 mi·16 min·James H. Quillen Parkway
8
Take the exit
0.2 mi·37 sec
Exit 8AToward I 81 South: Knoxville
9
Merge onto I 81
56 mi·1 hr·I 81
10
Continue on I 81
0.7 mi·45 sec·I 81
Exit 1BToward I 40 West: Knoxville
11
Merge onto I 40
53 mi·59 min·I 40
Use the straight / slight right lanes.
12
Keep slight right at fork onto I 40
110 mi·1 hr 57 min·I 40
Toward Nashville
13
Take the exit
0.2 mi·30 sec
Toward TN 53: Carthage, Gordonsville
14
Turn right onto SR 53
4.0 mi·6 min·Gordonsville Highway
15
Turn slight right onto SR 53
0.2 mi·37 sec·SR 53
Use the slight right lane.
16
Keep slight left at fork
174 ft·11 sec
17
Turn left onto US 70N; SR 53
0.7 mi·1 min·Cookeville Highway
Use the straight lane.
18
Arrive at destination
US 70N
Trip Plan
With a drive time of just under 4.5 hours, this route is easily manageable in a single day, offering flexibility in your departure time. Aim to leave Johnson City in the morning to maximize daylight and allow for any unforeseen delays. The longest stretch without a major change in direction is 162.4 miles on I-40, so plan your fuel and rest stops accordingly before you embark on that segment. Given the highway-intensive nature, keep an eye on your fuel gauge, as services can sometimes be spaced out on interstates. A specific tip: ensure your GPS is set to avoid tolls if that's a preference, though this route is largely toll-free.
Morning Departure
An early start around 7-8 AM gets you there with plenty of daylight left.
Evening Departure
A late afternoon start means arriving after dark. Morning is better.
You can normally do this drive in one day.
Plan roughly 1 meaningful break for fuel, food, and rest.
The halfway point lands around 119.9 miles from Johnson City, TN, or about 2h 15m into the drive.
The longest continuous stretch on this route runs about 162.4 miles.
This is a comfortable same-day trip.
Departure
Before you leave
Start with fuel, water, and navigation already sorted so the first hour feels easy.
First stop
Around 53 miles or 1h in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 119.9 miles or 2h 15m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 3h 37m
Traffic, exits, and arrival timing usually matter more near South Carthage, TN than in the middle of the route.
Before You Leave
+
Open the route before leaving Johnson City, TN so your first major turns are already loaded.
+
Leave with enough water and a charging cable within reach, not packed away.
+
Check your fuel range against the first long segment, especially if you are starting outside city service areas.
Day 1
Settle into the route from Johnson City, TN
This is one driving day of about 239.8 miles and 4h 27m.
Your first comfortable stop window is around 53 miles from Johnson City, TN.
This route can stay practical as a one-day drive if traffic stays reasonable.
Plan about 1 real break rather than only quick fuel stops.
The longest stretch is on I 40 for about 162.4 miles.
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Place data sourced from public business listings. Hours and availability may vary.
Heads-up: tricky spots
5 of 15
5 decision points cluster between mile 0.1 and 239.1 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
6
0.1 mi into trip|~0m in|Buffalo Street
Turn left onto Buffalo Street
Lane positioning matters here
Use the straight lane.
7
0.4 mi into trip|~1m in|North Roan Street
Turn left onto North Roan Street
Lane positioning matters here
Use the left lane.
5
15 mi into trip|~19m in
Take the exit toward I 81 South: Knoxville
Exit ramp - move to the correct lane early
Exit 8A
Toward I 81 South: Knoxville
5
72.3 mi into trip|~1h 21m in|I 40
Merge onto I 40
Merge point - match speed before joining. Lane positioning matters here
Use the straight / slight right lanes.
6
239.1 mi into trip|~4h 26m in|US 70N; SR 53 / Cookeville Highway
Turn left onto US 70N; SR 53 / Cookeville Highway
Lane positioning matters here
Use the straight lane.
Fuel & Cost
Regular Gas
$35.41 one way
$70.83 round trip
$3.75/gal25.4 MPG avg84 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.14
$39.09
$78.19
premium
$4.72
$44.52
$89.05
diesel
$4.80
$45.28
$90.56
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$35
Meals
$25–$50
Total
$60–$85
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 83.9 kg one way.
Prices: EIA weekly data, 2026-07-13.
Driving Electric?
About $25 in charging
· 0 stops
· 67% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
71.9
0
$25.18
$11.51
Efficient EV
60
0
$20.98
$9.59
EV Truck/SUV
95.9
1
$33.57
$15.35
Gas CO2
84 kg
EV CO2
28 kg (67% less)
Plan for 0 charging stops, roughly every 270 miles. Allow 25-40 minutes per stop at a DC fast charger.
DC fast charging avg $0.35/kWh. Home charging avg $0.16/kWh. US grid CO2: 0.39 kg/kWh.
Travel Intel
Current conditions at both ends of the drive.
Forecast as of Jul 18, 2026
Origin
Johnson City, TN
Morning
in Johnson City on Sunday
Local time
6:30 AM
EDT
Current temp
88°F
Chance Showers And Thunderstorms
W 0 to 10 mph59% chanceLive forecast
Destination
South Carthage, TN
Late night
in South Carthage on Sunday
Local time
5:30 AM
CDT
Current temp
91°F
Chance Showers And Thunderstorms
W 0 to 5 mph41% chanceLive forecast
Seasonal Notes
Summer travel usually means heavier construction, hotter rest stops, and busier weekend traffic around major cities.
Winter travel shortens daylight, so a route that looks manageable on paper can feel much longer after dark.
Holiday weekends tend to make both departure and arrival windows slower than the raw route time suggests.
Time zone
1 hour earlier
The destination clock does not match departure time, so double-check hotel check-in windows and late arrival plans.
Temperature spread
3 degrees warmer at arrival
A meaningful temperature swing is a good cue to rethink layers, water, and how soon you want to arrive.
Road read
4h 27m on the road
An early start around 7-8 AM gets you there with plenty of daylight left.
Weather data from the National Weather Service. Conditions may change; check closer to your travel date.
National Parks Near This Route
Worth a detour if your schedule allows.
Great Smoky Mountains National Park
National Park
Ridge upon ridge of forest straddles the border between North Carolina and Tennessee in Great Smoky Mountains National Park. World renowned for its diversity of plant and animal life, the beauty of it...
28 mi from route
~69 min detour
Free
near mile 82.7
Park data from the National Park Service API. Alerts update every 2 hours.
More Details
What kind of drive is this?
This trip is predominantly a highway-focused drive, with 97% of the route utilizing major roadways like I-40 and I-81. You can expect long stretches of consistent speed, with the longest uninterrupted segment covering 162.4 miles on I-40. While the majority of the journey is on these high-speed arteries, the inclusion of James H. Quillen Parkway suggests a brief transition or approach to one of the destinations. The overall character is one of efficient travel, minimizing winding roads and maximizing miles covered per hour.
97% highway — fuel and pacing are the main things to plan.
18 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 162.4 mi on I 40.
How Hard Is This Drive?
6/10
This is a straightforward highway drive that stays mostly on I 40 and I 81. You will hit about 15 points where you need to pay attention to lane position or signs. The trickiest moment comes around 0.1 miles in near Buffalo Street.
Driving Effort6/10
Moderate - straightforward overall, but long enough or busy enough to require pacing
Balances navigation complexity with total wheel time.
This drive requires moderate attention. Across 239.8 miles you will encounter 15 spots where lane choice or exit timing matters. Not difficult for experienced highway drivers, but worth previewing the tricky sections before you go.
Where does it get tricky?
The main spots that need attention: at 0.1 miles (Buffalo Street): Lane positioning matters here; at 0.4 miles (North Roan Street): Lane positioning matters here; at 15 miles: Exit ramp - move to the correct lane early.
Elevation Profile
Gently rolling terrain
2,029 ft498 ft
Total Climb
1,336 ft
Total Descent
2,466 ft
Highest Point
2,029 ft
~188.4 mi in
Elevation Range
1,531 ft
Towns Mentioned on Route Signs
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
On the drive from Johnson City, TN to South Carthage, TN, road signs begin pointing toward Nashville along the way.
Doable as a same-day drive at 4h 27m. Total distance: 239.8 miles.
Family Friendly
Moderate complexity with 1 natural rest stops along the way.
Solo Traveler
4h 27m drive, comfortable solo distance.
First-Time Driver
Mostly highway driving (97%). Some complex stretches to watch for.
Frequently Asked Questions
The longest stretch is about 162.4 miles on I 40. The full list of main roads is in the Roads section above.
Yes — we found about 27 rest areas or service plazas within a short detour of the route (from OpenStreetMap). See the Rest Stops tab under Nearby Places for locations and mile markers. Plan to stretch, use the bathroom, and top off fluids every 2–3 hours on longer drives.
It helps. This route has a higher-than-average number of complex decision points, which get harder in the dark. If the last hour of the trip is on surface roads or mountain grades, aim to arrive at South Carthage, TN before sunset when you can. Check the Trip Plan for departure windows that land you in daylight.
Only with planning. This is a long drive for kids — consider splitting it into two days rather than pushing through. Plan at least 1 meaningful breaks. There are 27 rest areas along the route for bathroom stops.
The main spots that need attention: at 0.1 miles (Buffalo Street): Lane positioning matters here; at 0.4 miles (North Roan Street): Lane positioning matters here; at 15 miles: Exit ramp - move to the correct lane early.
Yes — Great Smoky Mountains National Park. See the National Parks section for detour distances and tips on detours.
Possible but tiring. At 4.5 hours each way, an in-and-out day trip would put you behind the wheel for 8.9 hours — manageable with a long break at South Carthage, TN, but most travelers stay overnight.
