Compiled and reviewed by the Trip.ovh planning team at COD Solutions Oy · Last reviewed Apr 17, 2026 · Editorial standards
Drive Time
33m
Distance
20.5 mi
33 km
Drive Score
8/10
Great drive
Same Day?
Yes, doable
Fuel Cost
$3
one way
EV Charging
Unknown
Estimated drive times based on typical traffic patterns. Actual times may vary with weather, construction, and real-time conditions.
Johnson, TN
WoodysMedia
Loudon, TN
Kelly
The drive from Johnson, TN to Loudon, TN covers 20.5 miles and takes about 33m behind the wheel. This route is realistic as a one-day drive if you keep your stops efficient.
The route leans on I 75, Oakland Road, State Route 72 for much of the mileage, and the overall profile is highway-focused drive. The longest uninterrupted segment is about 8.6 miles on I 75. At current regular gas prices, budget about $3.20 one way before food or hotel costs.
Weekend Trip
Doable as a same-day drive at 33m. Total distance: 20.5 miles.
Family Friendly
Moderate complexity with 0 natural rest stops along the way.
Solo Traveler
33m drive, comfortable solo distance.
EV Driver
0 DC fast chargers along the route. Coverage: unknown.
First-Time Driver
Mostly highway driving (61%). Straightforward navigation.
This is a 33m highway drive covering 20.5 miles, with most of the trip on I 75 and Oakland Road. The longest continuous stretch is about 8.6 miles on I 75.
This is a straightforward highway drive that stays mostly on I 75 and Oakland Road. There are only a few real navigation decisions along the way. The trickiest moment comes around 1.5 miles in near SR 322 / Oakland Road.
Easy - simple navigation with a manageable amount of wheel time
Balances navigation complexity with total wheel time.
This is a straightforward 33m drive. You will face about 7 decision points, but nothing that requires special attention if you follow navigation.
Where does it get tricky?
The main spots that need attention: at 1.5 miles (SR 322 / Oakland Road): Navigation decision point; at 6.5 miles: Navigation decision point; at 6.8 miles (I 75): Merge point - match speed before joining.
These are the spots where you need to pay the most attention. Preview them before you drive.
At end of road, turn right onto SR 322 / Oakland Road
Navigation decision point
Take the ramp
Navigation decision point
Merge onto I 75
Merge point - match speed before joining
Take the exit toward Primary SR 72: Loudon
Exit ramp - move to the correct lane early
Turn left onto Grove Street
Navigation decision point
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
On the drive from Johnson, TN to Loudon, TN, road signs begin pointing toward Primary Sr 72: Loudon along the way.
Primary Sr 72: Loudon
| Road | Distance | Duration |
|---|---|---|
| I 75 | 8.6 mi | 9m |
| Oakland Road | 5.1 mi | 8m |
| State Route 72 | 3.9 mi | 6m |
| Raby Town Road | 1.5 mi | 5m |
| Grove Street | 0.6 mi | 1m |
| Blair Street | <0.1 mi | <1m |
Step-by-step road directions between Johnson, TN and Loudon, TN.
Start on Raby Town Road
At end of road, turn right onto SR 322
Take the ramp
Merge onto I 75
Take the exit
Turn right onto TN 72
Turn left onto Grove Street
Turn left onto Blair Street
Arrive at destination
Regular Gas
$3.20 one way
$6.41 round trip
| Fuel Type | $/gal | One Way | Round Trip |
|---|---|---|---|
| midgrade | $4.36 | $3.52 | $7.04 |
| premium | $4.89 | $3.95 | $7.89 |
| diesel | $5.61 | $4.53 | $9.05 |
No toll roads detected on this route.
Drive Cost (one way)
Fuel
$3
Estimated CO2 emission: 7.2 kg one way. Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $2 in charging · 0 stops · 71% less CO2
| Vehicle Type | kWh | Stops | DC Fast | Home Charge |
|---|---|---|---|---|
| Average EV | 6.1 | 0 | $2.15 | $0.98 |
| Efficient EV | 5.1 | 0 | $1.79 | $0.82 |
| EV Truck/SUV | 8.2 | 0 | $2.87 | $1.31 |
Gas CO2
7 kg
EV CO2
2 kg (71% less)
This trip is well within single-charge range for most EVs. No charging stops needed if you start fully charged.
DC fast charging avg $0.35/kWh. Home charging avg $0.16/kWh. US grid CO2: 0.39 kg/kWh.
Current conditions at both ends of the drive.
Origin
Morning in Johnson on Friday
Local time
8:14 AM
EDT
Current temp
83°F
Slight Chance Showers And Thunderstorms
Destination
Morning in Loudon on Friday
Local time
8:14 AM
EDT
Current temp
48°F
Unavailable
Time zone
Origin and destination are on the same clock, so arrival timing is easier to judge at a glance.
Temperature spread
A meaningful temperature swing is a good cue to rethink layers, water, and how soon you want to arrive.
Road read
The weather snapshot is not static. If you are leaving later, give both cities one more quick forecast check before departure.
Weather data from the National Weather Service. Conditions may change; check closer to your travel date.
Compiled and maintained by the Trip.ovh planning team at COD Solutions Oy (Helsinki). Each route is built from authoritative open government and mapping datasets rather than crowdsourced reviews. Distances and geometry come from OSRM over OpenStreetMap. Fuel cost uses EIA weekly regional averages. Pages are published only after passing our data-quality checks; our methodology page documents refresh cadence, editorial standards, and known limitations.
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