The drive from Johnson, TN to Germantown, TN covers 362.4 miles and takes about 6h 56m behind the wheel.
This route is realistic as a one-day drive if you keep your stops efficient.
The route leans on I 40, Loudon Highway, North Germantown Parkway for much of the mileage,
and the overall profile is highway-focused drive.
The longest uninterrupted segment is about 332.8 miles on I 40.
At current regular gas prices, budget about $56.66 one way before food or hotel costs.
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
181.2 miles from Johnson, TN
A natural place for your longest stop of the day
, about 3h 34m into the drive
.
Who Is This Route For?
Weekend Trip
Doable as a same-day drive at 6h 56m. Total distance: 362.4 miles.
Family Friendly
Moderate complexity with 1 natural rest stops along the way.
Solo Traveler
6h 56m drive, plan rest stops for pacing.
Drive Character
This is a 6h 56m highway drive covering 362.4 miles, with most of the trip on I 40 and Loudon Highway. The longest continuous stretch is about 332.8 miles on I 40.
Most of the miles stay on highways, which makes pacing and fuel planning easier than turn-by-turn city driving.
There are about 18 navigation steps in the underlying route data, so the final approach matters more than the middle miles.
I 40 is the longest continuous segment at about 332.8 miles.
How Hard Is This Drive?
This is a straightforward highway drive that stays mostly on I 40 and Loudon Highway. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes around 18.7 miles in near I 40.
Driving Effort8/10
Demanding - plan breaks and stay ahead of the key maneuvers
Balances navigation complexity with total wheel time.
This is a demanding drive. With 13 significant decision points across 362.4 miles, you will need to stay alert - especially through interchange areas and urban stretches. Consider splitting it into segments if you are not comfortable with fast highway navigation.
Where does it get tricky?
The main spots that need attention: at 18.7 miles (I 40): Merge point - match speed before joining. Lane positioning matters here; at 157.8 miles (I 40): Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one; at 159.9 miles (I 40): Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one.
Critical Maneuvers
5 of 13 key points
These are the spots where you need to pay the most attention. Preview them before you drive.
5
18.7 mi into trip|~37m in|I 40
Merge onto I 40
Merge point - match speed before joining. Lane positioning matters here
Use the straight / slight right lanes.
9
157.8 mi into trip|~3h 7m in|I 40
Keep slight right at fork onto I 40 toward I 24 West, I 40 West: Nashville
Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one
Use the straight / slight right lanes.
Exit 213B
Toward I 24 West, I 40 West: Nashville
8
159.9 mi into trip|~3h 10m in|I 40
Keep slight left at fork onto I 40 toward I 40 West: Huntsville, Memphis
Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one
Use the slight left lane.
Toward I 40 West: Huntsville, Memphis
7
163.3 mi into trip|~3h 15m in|I 40
Keep slight left at fork onto I 40 toward I 40 West: Memphis
Highway fork - watch signs carefully. Lane positioning matters here
Use the slight left / slight right lanes.
Toward I 40 West: Memphis
7
354.4 mi into trip|~6h 42m in
Take the exit toward TN 177 South: Germantown
Exit ramp - move to the correct lane early. Lane positioning matters here
Use the right lane.
Exit 16A
Toward TN 177 South: Germantown
Towns Mentioned on Route Signs
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
Between Johnson, TN and Germantown, TN, road signs point toward Memphis and Louisville.
Memphis
159.9 mi in|~3h 10m|via I 40
Louisville
161 mi in|~3h 12m|via I 40
Main Roads
Road
Distance
Duration
I 40
332.8 mi
6h
Loudon Highway
5.4 mi
8m
North Germantown Parkway
5.4 mi
8m
Decatur Highway
4.6 mi
6m
Sweetwater Road
3.6 mi
6m
Downtown Loop
2.9 mi
3m
Johnson Valley Road
2.5 mi
9m
South Germantown Road
2.2 mi
4m
Longest stretch:
I 40
— 332.8 mi, about 6h
Turn-by-Turn Driving Directions
Step-by-step road directions between Johnson, TN and Germantown, TN.
1
Start on Raby Town Road
135 ft·6 sec·Raby Town Road
2
Continue on Johnson Valley Road
2.5 mi·9 min·Johnson Valley Road
3
At end of road, turn left onto SR 322
3.6 mi·6 min·Sweetwater Road
4
At end of road, turn left onto SR 72
5.4 mi·8 min·Loudon Highway
5
At end of road, turn right onto SR 58
4.6 mi·6 min·Decatur Highway
6
Continue on SR 58
2.2 mi·5 min·South Kentucky Street
7
Turn left
0.3 mi·43 sec
8
Merge onto I 40
139 mi·2 hr 29 min·I 40
Use the straight / slight right lanes.
9
Keep slight right at fork onto I 40
2.1 mi·3 min·I 40
Exit 213BToward I 24 West, I 40 West: NashvilleUse the straight / slight right lanes.
10
Keep slight left at fork onto I 40
0.4 mi·42 sec·I 40
Toward I 40 West: Huntsville, MemphisUse the slight left lane.
11
Merge onto I 40
0.6 mi·52 sec·Downtown Loop
Use the straight / slight right lanes.
12
Continue on I 40
2.3 mi·3 min·Downtown Loop
Exit 210AToward I 40 West, I 65 North: Memphis, LouisvilleUse the straight / slight right lanes.
13
Keep slight left at fork onto I 40
191 mi·3 hr 26 min·I 40
Toward I 40 West: MemphisUse the slight left / slight right lanes.
14
Take the exit
0.3 mi·50 sec
Exit 16AToward TN 177 South: GermantownUse the right lane.
15
Turn straight onto TN 177
5.4 mi·8 min·North Germantown Parkway
Use the left lane.
16
Continue on TN 177
2.2 mi·4 min·South Germantown Road
17
Turn left onto Southern Avenue
175 ft·7 sec·Southern Avenue
18
Arrive at destination
Southern Avenue
Trip Plan
Morning Departure
Start early — leave by 6-7 AM to arrive at a reasonable hour.
Evening Departure
This is a long drive — plan for a morning departure or consider splitting it into two days.
You can normally do this drive in one day.
Plan roughly 1 meaningful break for fuel, food, and rest.
The halfway point lands around 181.2 miles from Johnson, TN, or about 3h 34m into the drive.
The longest continuous stretch on this route runs about 332.8 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 80 miles or 1h 43m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 181.2 miles or 3h 34m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 5h 45m
Traffic, exits, and arrival timing usually matter more near Germantown, TN than in the middle of the route.
Before You Leave
+
Open the route before leaving Johnson, 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, TN
This is one driving day of about 362.4 miles and 6h 56m.
Your first comfortable stop window is around 80 miles from Johnson, 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 332.8 miles.
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Halfway Point
Midpoint
About 181.2 mi from Johnson, TN
· 3h 34m into the drive
The midpoint is around 181.2 miles from Johnson, TN, which is a good place for a longer meal and fuel stop.
Arriving in Germantown, TN
The final approach into Germantown, TN usually feels slower than the middle of the drive, so avoid planning your tightest schedule at the very end.
Try to arrive with enough fuel left to skip an immediate station stop unless you already know the area around Germantown, TN.
After long uninterrupted mileage, take five minutes before the last urban segment to reset and refocus on exits, merges, and city traffic.
These stop ideas are pacing suggestions — the exact town or exit can change with traffic, hotel plans, and fuel range.
National Parks Near This Route
Worth a detour if your schedule allows.
Stones River National Battlefield
National Battlefield
The Battle of Stones River began on the last day of 1862 and became one of the bloodiest conflicts of the Civil War. The battle produced important military and political gains for the Union, and it ch...
22 mi from route
~54 min detour
Free
near mile 137.5
Park data from the National Park Service API. Alerts update every 2 hours.
Fuel & Cost
Regular Gas
$56.66 one way
$113.31 round trip
$3.97/gal25.4 MPG avg127 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.36
$62.21
$124.41
premium
$4.89
$69.74
$139.48
diesel
$5.61
$80.01
$160.03
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$57
Meals
$25–$50
Total
$82–$107
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 126.8 kg one way.
Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $38 in charging
· 1 stop
· 67% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
108.7
1
$38.05
$17.40
Efficient EV
90.6
1
$31.71
$14.50
EV Truck/SUV
145
1
$50.74
$23.19
Gas CO2
127 kg
EV CO2
42 kg (67% less)
Plan for 1 charging stop. A 30-minute DC fast charge mid-route should be enough to complete the trip comfortably.
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 Apr 15, 2026
Origin
Johnson, TN
Night
in Johnson on Friday
Local time
9:43 PM
EDT
Current temp
76°F
Unavailable
Live forecast
Destination
Germantown, TN
Evening
in Germantown on Friday
Local time
8:43 PM
CDT
Current temp
57°F
Unavailable
Live 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
19 degrees cooler at arrival
A meaningful temperature swing is a good cue to rethink layers, water, and how soon you want to arrive.
Road read
6h 56m on the road
Start early — leave by 6-7 AM to arrive at a reasonable hour.
Weather data from the National Weather Service. Conditions may change; check closer to your travel date.
Frequently Asked Questions
The drive from Johnson, TN to Germantown, TN covers 362.4 miles and takes about 6h 56m without stops. Add 15-30 minutes for a fuel or rest stop on longer drives.
The main roads are I 40, Loudon Highway, North Germantown Parkway. Most of the drive stays on highways, so watch for ramps and exits.
This is a comfortable same-day trip.
The midpoint is about 181.2 miles from Johnson, TN. Look for rest areas, gas stations, or food options near the halfway mark.
At current regular gas prices, expect to spend about $56.66 one way. This estimate uses 25.4 MPG — your actual cost will vary with your vehicle's fuel efficiency and current gas prices.
Start early — leave by 6-7 AM to arrive at a reasonable hour. This is a long drive — plan for a morning departure or consider splitting it into two days.
Plan about 1 meaningful break for fuel, food, or rest. Plan on a short reset every 3 to 4 hours to stay fresh behind the wheel.
This is a demanding drive. With 13 significant decision points across 362.4 miles, you will need to stay alert - especially through interchange areas and urban stretches. Consider splitting it into segments if you are not comfortable with fast highway navigation.
The main spots that need attention: at 18.7 miles (I 40): Merge point - match speed before joining. Lane positioning matters here; at 157.8 miles (I 40): Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one; at 159.9 miles (I 40): Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one.
Between Johnson, TN and Germantown, TN, road signs point toward Memphis and Louisville.
How this page is built
Compiled by the Trip.ovh planning team at COD Solutions Oy from open government datasets — OSRM over OpenStreetMap for geometry, EIA for fuel prices, and NPS for national parks. See our methodology for refresh cadence and limitations.
