Compiled and reviewed by the US Trip Planner planning team at COD Solutions Oy · Last reviewed Sep 12, 2026 · Editorial standards
Drive Time
1h 57m
Distance
89.9 mi
145 km
Drive Score
7/10
Good drive
Same Day?
Yes, doable
Fuel Cost
$15
one way
EV Charging
Unknown
Estimated drive times based on typical traffic patterns. Actual times may vary with weather, construction, and real-time conditions.
Union, NJ
Arjun Gheewala
Williamstown, NJ
Garrison Gao
The drive from Union, NJ to Williamstown, NJ covers 89.9 miles and takes about 1h 57m behind the wheel. This route is realistic as a one-day drive if you keep your stops efficient.
The route leans on New Jersey Turnpike, NJ 73, Garden State Parkway for much of the mileage, and the overall profile is mostly highway. The longest uninterrupted segment is about 55.9 miles on New Jersey Turnpike. At current regular gas prices, budget about $15.45 one way before food or hotel costs.
Trip Pace
Same-day drive is realistic
A same-day return is realistic if you keep stops short.
Midpoint
44.9 miles from Union, NJ
A natural place for your longest stop of the day , about 58m into the drive .
| Road | Distance | Duration |
|---|---|---|
| New Jersey Turnpike | 55.9 mi | 1h 4m |
| NJ 73 | 11.8 mi | 16m |
| Garden State Parkway | 8.6 mi | 11m |
| Williamstown Road | 4.1 mi | 6m |
| Garden State Parkway Southbound | 2.3 mi | 3m |
| Taunton Road | 1.7 mi | 2m |
| Sicklerville Road | 1.5 mi | 2m |
| Stuyvesant Avenue | 0.6 mi | 1m |
Step-by-step road directions between Union, NJ and Williamstown, NJ.
Start on Harding Avenue
Turn right onto CR 630
Turn left onto CR 619
Continue on CR 619
Take the ramp
Merge onto GSP
Continue on Garden State Parkway
Take the exit onto Exit 129
Keep slight left at fork
Keep slight left at fork
Keep slight left at fork
Keep slight left at fork
Merge onto I 95; NJTP
Keep slight left at fork onto NJTP
Take the exit
Keep slight left at fork
Merge onto NJ 73
Continue on NJ 73
Continue on NJ 73
Continue on NJ 73
Take the exit
Turn straight onto CR 536 Spur
Continue on CR 536 Spur
Continue on CR 536 Spur
Turn left
Turn right
Arrive at destination
Morning Departure
Leave by 9 AM and you'll arrive before lunch.
Evening Departure
Even a 4 PM departure gets you there before dark in summer.
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 20 miles or 29m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 44.9 miles or 58m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 1h 36m
Traffic, exits, and arrival timing usually matter more near Williamstown, NJ than in the middle of the route.
Open the route before leaving Union, NJ so your first major turns are already loaded.
Day 1
Settle into the route from Union, NJ
This is one driving day of about 89.9 miles and 1h 57m.
Rest stops, refuel points, and overnight suggestions along this route.
Mid-route town
Meal stop
45 mi into the route
Best for: Lunch, fuel, and a longer reset
This sits close to the middle of the route, so it works well for the longest stop of the day.
A short stop after about 20 miles helps settle the day before fatigue starts building.
The midpoint is around 44.9 miles from Union, NJ, which is a good place for a longer meal and fuel stop.
These stop ideas are pacing suggestions — the exact town or exit can change with traffic, hotel plans, and fuel range.
5 decision points cluster between mile 1 and 70.1 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
Take the ramp toward GSP Toll South
Lane positioning matters here
Take the exit onto Exit 129 toward I 95, NJTP, US 9, NJ 440, I 287: New York City, Philadelphia, Woodbridge, Perth Amboy
Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one
Keep slight left at fork toward I 95, NJTP: New York City, Philadelphia
Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one
Keep slight left at fork toward I 95 South, NJTP South: Trenton
Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one
Keep slight left at fork toward NJ 73 South: Marlton, Atlantic City
Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one
Regular Gas
$15.45 one way
$30.90 round trip
| Fuel Type | $/gal | One Way | Round Trip |
|---|---|---|---|
| midgrade | $4.79 | $16.95 | $33.91 |
| premium | $5.13 | $18.15 | $36.29 |
| diesel | $5.97 | $21.12 | $42.24 |
Estimated Tolls: $8.49
Toll estimates based on average 2024-2025 rates. EZ-Pass/SunPass discounts may lower the actual cost.
Estimated Trip Cost (one way, 1 person)
Fuel
$15
Tolls
$8
Meals
$25–$50
Total
$49–$74
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 31.5 kg one way. Prices: EIA weekly data, 2026-09-07.
Driving Electric?
About $9 in charging · 0 stops · 65% less CO2
| Vehicle Type | kWh | Stops | DC Fast | Home Charge |
|---|---|---|---|---|
| Average EV | 27 | 0 | $9.44 | $4.32 |
| Efficient EV | 22.5 | 0 | $7.87 | $3.60 |
| EV Truck/SUV | 36 | 0 | $12.59 | $5.75 |
Gas CO2
31 kg
EV CO2
11 kg (65% 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 Union on Saturday
Local time
6:24 AM
EDT
Current temp
64°F
Partly Cloudy
Destination
Morning in Williamstown on Saturday
Local time
6:24 AM
EDT
Current temp
60°F
Mostly Clear
64°F
Bristol, PA
45 mi in
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
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.
Worth a detour if your schedule allows.
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Park data from the National Park Service API. Alerts update every 2 hours.
89.9 mi in 1h 57m, mostly highway — 55.9 mi of that is on New Jersey Turnpike.
This is a straightforward highway drive that stays mostly on New Jersey Turnpike and NJ 73. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes around 1 miles in.
Demanding - stay alert through the decision-heavy sections
Balances navigation complexity with total wheel time.
This drive requires moderate attention. Across 89.9 miles you will encounter 17 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 1 miles: Lane positioning matters here; at 12.2 miles (Exit 129): Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one; at 12.5 miles: Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one.
Mostly flat terrain
Total Climb
266 ft
Total Descent
224 ft
Highest Point
171 ft
~83.5 mi in
Elevation Range
121 ft
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
Between Union, NJ and Williamstown, NJ, road signs point toward Njtp, Philadelphia, Woodbridge, Perth Amboy, Njtp: New York City and Njtp South: Trenton - among others.
Njtp
Philadelphia
Woodbridge
Perth Amboy
Njtp: New York City
Njtp South: Trenton
Njtp South: Camden
Wilmington
Camden
Atlantic City
Founded 1737
Williamstown is a city in the Delaware River region of New Jersey.
City content from Wikivoyage (CC BY-SA 4.0) and Wikidata (CC0).
Weekend Trip
Doable as a same-day drive at 1h 57m. Total distance: 89.9 miles.
Family Friendly
Moderate complexity with 0 natural rest stops along the way.
Solo Traveler
1h 57m drive, comfortable solo distance.
First-Time Driver
Mostly highway driving (87%). Some complex stretches to watch for.
Compiled by the US Trip Planner planning team at COD Solutions Oy from open government datasets — OSRM over OpenStreetMap for geometry, EIA for fuel prices, USGS 3DEP for elevation, and NPS for national parks. See our methodology for refresh cadence and limitations.
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