Merrimac, VA to Alexandria, VA is 269.6 miles and takes about 5h 9m via I 81 and I 66, with a fuel budget near $42 and enough daylight to finish in a day. This trip stays within Virginia, moving from the Southeast region to the Southeast region. The majority of this route is on major interstates, making it a straightforward drive. With a recommended one-day travel time, it's a solid option for a direct trip between these two points.
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
134.8 miles from Merrimac, VA
A natural place for your longest stop of the day
, about 2h 35m into the drive
.
Main Roads
Road
Distance
Duration
I 81
181.3 mi
3h 20m
I 66
64.1 mi
1h 11m
Capital Beltway
12.1 mi
15m
US 460
2.1 mi
2m
Capital Beltway (Local)
2 mi
2m
Merrimac Road
1.2 mi
2m
North Franklin Street
1.2 mi
2m
Roanoke Street
1.1 mi
2m
Longest stretch:
I 81
— 181.3 mi, about 3h 20m
Traffic on I-81
Hour-of-day weekday pattern from 85 FHWA count stations on your route.
Peak
4 PM
~1,718 veh/hr typical
· worst 2,250
Quietest
2 AM
~248 veh/hr
Peak-to-quiet ratio
6.9×
busier at peak than in the quiet hours
12a6anoon6p11p
Averaged across 52 weeks of 2023 FHWA Travel Monitoring Analysis System data. Weekday hours only (Mon–Fri).
Turn-by-Turn Driving Directions
Step-by-step road directions between Merrimac, VA and Alexandria, VA.
1
Start on SR 657
1.2 mi·2 min·Merrimac Road
2
Turn right onto US 460 BUS
0.4 mi·35 sec·South Main Street
3
Continue on US 460 BUS
1.2 mi·2 min·North Franklin Street
Use the straight lane.
4
Take the ramp
0.6 mi·1 min
Toward US 460 East: Roanoke
5
Merge onto US 460
2.1 mi·2 min·US 460
Toward US 460 East
6
Take the exit
0.2 mi·32 sec
Exit 2Toward US 11, US 460 Business: Christiansburg
7
Turn left onto US 11; US 460 BUS
1.1 mi·2 min·Roanoke Street
Use the left / straight lanes.
8
Take the ramp
1.0 mi·2 min
Toward I 81 North, US 460 East: Salem, RoanokeUse the straight / slight right lanes.
9
Merge onto I 81
102 mi·1 hr 54 min·I 81
Use the straight / slight right lanes.
10
Keep slight left at fork onto I 81
79 mi·1 hr 26 min·I 81
11
Take the exit
0.4 mi·47 sec
Toward I 66 East: Front Royal, Washington
12
Continue on I 66
43 mi·46 min·I 66
13
Keep slight right at fork onto I 66
21 mi·25 min·I 66
Use the straight lane.
14
Take the exit
0.4 mi·41 sec
Exit 64AToward I 495 South: Richmond, AlexandriaUse the right lane.
15
Merge onto I 495
12 mi·15 min·Capital Beltway
Use the straight / slight right lanes.
16
Keep slight right at fork onto I 95; I 495
2.0 mi·2 min·Capital Beltway (Local)
Toward I 95, I 495: AlexandriaUse the slight right lane.
17
Take the exit
0.2 mi·23 sec
Exit 177A-BToward US 1: Alexandria, Fort BelvoirUse the slight right lane.
18
Keep slight left at fork
0.4 mi·56 sec
Exit 177BToward US 1 North: Alexandria
19
Merge onto US 1
440 ft·8 sec·Richmond Highway
20
Continue on US 1
0.3 mi·45 sec·South Patrick Street
21
Turn right onto Franklin Street
0.2 mi·28 sec·Franklin Street
Use the right lane.
22
Turn left onto VA 400
0.5 mi·1 min·South Washington Street
Use the left lane.
23
Arrive at destination
VA 400
Trip Plan
For this 5-hour drive, leaving in the morning is your best bet to maximize daylight and avoid potential rush hour traffic closer to Alexandria. Since it's a single-day trip, you'll likely only need one planned stop for fuel or a break. Keep an eye on your fuel gauge, especially as you approach the 181.3-mile stretch on I 81, to ensure you have enough to reach your next service area. The relatively short duration means you have flexibility if you decide to depart a bit later.
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 134.8 miles from Merrimac, VA, or about 2h 35m into the drive.
The longest continuous stretch on this route runs about 181.3 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 59 miles or 1h 11m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 134.8 miles or 2h 35m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 4h 9m
Traffic, exits, and arrival timing usually matter more near Alexandria, VA than in the middle of the route.
Before You Leave
+
Open the route before leaving Merrimac, VA 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 Merrimac, VA
This is one driving day of about 269.6 miles and 5h 9m.
Your first comfortable stop window is around 59 miles from Merrimac, VA.
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 81 for about 181.3 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 18
5 decision points cluster between mile 5.4 and 268 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
6
5.4 mi into trip|~9m in
Take the exit toward US 11, US 460 Business: Christiansburg
Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one
Exit 2
Toward US 11, US 460 Business: Christiansburg
6
6.7 mi into trip|~12m in
Take the ramp toward I 81 North, US 460 East: Salem, Roanoke
Lane positioning matters here. Multiple destination signs - pick the right one
Use the straight / slight right lanes.
Toward I 81 North, US 460 East: Salem, Roanoke
8
253.4 mi into trip|~4h 46m in
Take the exit toward I 495 South: Richmond, Alexandria
Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one
Use the right lane.
Exit 64A
Toward I 495 South: Richmond, Alexandria
8
266 mi into trip|~5h 2m in|I 95; I 495 / Capital Beltway (Local)
Keep slight right at fork onto I 95; I 495 / Capital Beltway (Local) toward I 95, I 495: Alexandria
Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one
Use the slight right lane.
Toward I 95, I 495: Alexandria
8
268 mi into trip|~5h 5m in
Take the exit toward US 1: Alexandria, Fort Belvoir
Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one
Use the slight right lane.
Exit 177A-B
Toward US 1: Alexandria, Fort Belvoir
Fuel & Cost
Regular Gas
$39.80 one way
$79.61 round trip
$3.75/gal25.4 MPG avg94 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.12
$43.74
$87.48
premium
$4.49
$47.68
$95.36
diesel
$4.80
$50.91
$101.81
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$40
Meals
$25–$50
Total
$65–$90
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 94.3 kg one way.
Prices: EIA weekly data, 2026-07-13.
Driving Electric?
About $28 in charging
· 0 stops
· 66% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
80.9
0
$28.31
$12.94
Efficient EV
67.4
0
$23.59
$10.78
EV Truck/SUV
107.8
1
$37.74
$17.25
Gas CO2
94 kg
EV CO2
32 kg (66% 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
Merrimac, VA
Afternoon
in Merrimac on Sunday
Local time
1:42 PM
EDT
Current temp
70°F
Patchy Fog
W 1 mph3% chanceLive forecast
Special Weather Statement
Special Weather Statement issued July 18 at 1:18AM EDT by NWS Morristown TN
Destination
Alexandria, VA
Afternoon
in Alexandria on Sunday
Local time
1:42 PM
EDT
Current temp
75°F
Smoke
S 3 mph17% chanceLive forecast
Special Weather Statement
Special Weather Statement issued July 18 at 1:18AM EDT by NWS Morristown TN
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
Same local time
Origin and destination are on the same clock, so arrival timing is easier to judge at a glance.
Temperature spread
5 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
5h 9m 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.
Cedar Creek & Belle Grove National Historical Park
National Historical Park
Virginia’s Shenandoah Valley has a long and rich heritage that still inspires today. Native Americans first shaped the land, followed by colonists and settlers. The fertile valley became an important...
Just 75 miles from the bustle of Washington, D.C., Shenandoah National Park is a land bursting with cascading waterfalls, spectacular vistas, fields of wildflowers, and quiet wooded hollows. With over...
16 mi from route
~39 min detour
$30
near mile 148.8
Booker T. Washington was born a slave in April 1856 on the 207-acre farm of James Burroughs. After the Civil War, Washington became the first principal of Tuskegee Normal and Industrial School. Later...
20 mi from route
~51 min detour
Free
near mile 37.2
The Potomac River corridor is rich in both history and recreation, offering a chance to both explore your heritage and choose your adventure along the way. Start your journey here!
22 mi from route
~54 min detour
Free
near mile 241.7
Park data from the National Park Service API. Alerts update every 2 hours.
More Details
What kind of drive is this?
This drive is heavily weighted toward interstate travel, with 92% of the route on highways. You'll experience a long stretch of 181.3 miles on I 81, offering a consistent cruising experience. The transition to surface roads will occur later in the drive, likely around the end of the interstate segments before reaching your destination.
92% highway — fuel and pacing are the main things to plan.
23 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 181.3 mi on I 81.
How Hard Is This Drive?
10/10
This is a straightforward highway drive that stays mostly on I 81 and I 66. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes around 5.4 miles in.
Driving Effort10/10
High effort - long or complex enough to need steady focus all day
Balances navigation complexity with total wheel time.
This is a demanding drive. With 18 significant decision points across 269.6 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 5.4 miles: Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one; at 6.7 miles: Lane positioning matters here. Multiple destination signs - pick the right one; at 253.4 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one.
Elevation Profile
Gently rolling terrain
1,987 ft37 ft
Total Climb
777 ft
Total Descent
2,727 ft
Highest Point
1,987 ft
Elevation Range
1,950 ft
Notable High Points
1,814 ft at ~96.3 miles+535 ft prominence
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 Merrimac, VA to Alexandria, VA, road signs begin pointing toward Washington along the way.
Doable as a same-day drive at 5h 9m. Total distance: 269.6 miles.
Family Friendly
Moderate complexity with 1 natural rest stops along the way.
Solo Traveler
5h 9m drive, comfortable solo distance.
First-Time Driver
Mostly highway driving (92%). Some complex stretches to watch for.
Frequently Asked Questions
The longest stretch is about 181.3 miles on I 81. The full list of main roads is in the Roads section above.
Yes — we found about 23 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 Alexandria, VA 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 23 rest areas along the route for bathroom stops.
The main spots that need attention: at 5.4 miles: Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one; at 6.7 miles: Lane positioning matters here. Multiple destination signs - pick the right one; at 253.4 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one.
Yes — Cedar Creek & Belle Grove National Historical Park, Shenandoah National Park and Booker T Washington National Monument (4 total within detour distance). See the National Parks section for detour distances and tips on detours.
Not recommended in a single day. At 5.2 hours each way, a round trip means 10.3 hours of driving — that is an unsafe level of fatigue for most drivers. Plan at least one night at Alexandria, VA before the return drive.
