Croydon to Mercer is 363.5 miles and takes about 6h 42m via Keystone Shortway, with a fuel budget near $61 and enough daylight to finish in a day. This drive stays within Pennsylvania, moving from the Northeast region towards the state's western side. Expect a route that primarily utilizes surface roads, offering a more grounded travel experience than a pure interstate trip. With only one recommended stop and a manageable duration, this is a solid option for a single-day excursion.
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
181.7 miles from Croydon, PA
A natural place for your longest stop of the day
, about 3h 23m into the drive
.
Main Roads
Road
Distance
Duration
Keystone Shortway
261.1 mi
4h 42m
Pennsylvania Turnpike Northeast Extension
74.2 mi
1h 20m
Pennsylvania Turnpike
17.1 mi
18m
Street Road
4.2 mi
7m
South Erie Street
2.3 mi
3m
State Road
1.6 mi
3m
Lincoln Highway
0.3 mi
<1m
Erie Street
—
—
Some road-level metrics are being recalculated.
Longest stretch:
Keystone Shortway
— 261.1 mi, about 4h 42m
Traffic on I-80
Hour-of-day weekday pattern from 38 FHWA count stations on your route.
Peak
3 PM
~1,080 veh/hr typical
· worst 1,454
Quietest
2 AM
~183 veh/hr
Peak-to-quiet ratio
5.9×
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 Croydon, PA and Mercer, PA.
1
Start on State Road
1.6 mi·3 min·State Road
2
Turn right onto Street Road
4.2 mi·7 min·Street Road
Use the right lane.
3
Take the ramp
0.2 mi·23 sec
Toward US 1 North: Trenton
4
Merge onto US 1
0.3 mi·26 sec·Lincoln Highway
Toward US 1 North: Morrisville
5
Take the exit
0.6 mi·1 min
Toward I 276, PATPUse the right lane.
6
Keep slight right at fork
0.2 mi·27 sec
Toward I 276 Toll West: Harrisburg, AllentownUse the slight right lane.
7
Merge onto I 276; PATP
17 mi·18 min·Pennsylvania Turnpike
Use the straight / slight right lanes.
8
Take the exit
0.1 mi·19 sec
Toward I 476: Chester, AllentownUse the slight right lane.
Exit 95Toward PA 940, I 80: Hazleton, Mount Pocono
12
Keep slight left at fork
0.2 mi·23 sec
13
Keep slight right at fork
0.3 mi·40 sec
Toward I 80 West: Hazleton
14
Merge onto I 80
261 mi·4 hr 42 min·Keystone Shortway
15
Take the exit
0.2 mi·23 sec
Exit 15Toward US 19: Mercer
16
Keep slight right at fork
240 ft·7 sec
17
Turn straight onto US 19
2.3 mi·3 min·South Erie Street
Use the straight / right lanes.
18
Arrive at destination
US 19; US 62; PA 58; PA 258
Trip Plan
Given the 6h 42m duration, starting your drive in Croydon early in the morning is your best bet to arrive in Mercer with plenty of daylight. While this trip is designed for a single day, the longest stretch on the Keystone Shortway is quite substantial at 261.1 miles, so plan your fuel stops accordingly before hitting that section. With only one recommended stop, you have flexibility to take breaks as needed, but be mindful of the transition from highway to surface roads which may slow your pace.
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 181.7 miles from Croydon, PA, or about 3h 23m into the drive.
The longest continuous stretch on this route runs about 261.1 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 32m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 181.7 miles or 3h 23m 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 35m
Traffic, exits, and arrival timing usually matter more near Mercer, PA than in the middle of the route.
Before You Leave
+
Open the route before leaving Croydon, PA 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 Croydon, PA
This is one driving day of about 363.5 miles and 6h 42m.
Your first comfortable stop window is around 80 miles from Croydon, PA.
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 Keystone Shortway for about 261.1 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 16
5 decision points cluster between mile 1.6 and 98.7 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
6
1.6 mi into trip|~3m in|Street Road
Turn right onto Street Road
Lane positioning matters here
Use the right lane.
7
6.2 mi into trip|~10m in
Take the exit toward I 276, PATP
Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one
Use the right lane.
Toward I 276, PATP
8
6.8 mi into trip|~12m in
Keep slight right at fork toward I 276 Toll West: Harrisburg, Allentown
Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one
Use the slight right lane.
Toward I 276 Toll West: Harrisburg, Allentown
7
24.1 mi into trip|~31m in
Take the exit toward I 476: Chester, Allentown
Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one
Use the slight right lane.
Toward I 476: Chester, Allentown
6
98.7 mi into trip|~1h 52m in
Take the exit toward PA 940, I 80: Hazleton, Mount Pocono
Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one
Exit 95
Toward PA 940, I 80: Hazleton, Mount Pocono
Fuel & Cost
Regular Gas
$64.29 one way
$128.57 round trip
$4.49/gal25.4 MPG avg127 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.92
$70.41
$140.82
premium
$5.24
$75.05
$150.09
diesel
$5.35
$76.56
$153.13
Estimated Tolls: $11.87
Pennsylvania Turnpike
(91.2 mi)$11.87
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
$64
Tolls
$12
Meals
$25–$50
Total
$101–$126
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 127.2 kg one way.
Prices: EIA weekly data, 2026-06-01.
Driving Electric?
About $38 in charging
· 1 stop
· 66% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
109.1
1
$38.17
$17.45
Efficient EV
90.9
1
$31.81
$14.54
EV Truck/SUV
145.4
1
$50.89
$23.26
Gas CO2
127 kg
EV CO2
43 kg (66% 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 Jun 3, 2026
Origin
Croydon, PA
Afternoon
in Croydon on Wednesday
Local time
3:53 PM
EDT
Current temp
58°F
Mostly Clear
N 0 to 5 mph1% chanceLive forecast
Destination
Mercer, PA
Afternoon
in Mercer on Wednesday
Local time
3:53 PM
EDT
Current temp
50°F
Mostly Clear
NE 1 mph0% 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
Same local time
Origin and destination are on the same clock, so arrival timing is easier to judge at a glance.
Temperature spread
8 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 42m 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.
National Parks Near This Route
Worth a detour if your schedule allows.
Valley Forge National Historical Park
National Historical Park
Valley Forge is the place where George Washington and the Continental Army took refuge during the winter of 1777-1778. Today the park protects 3,500 acres of meadows, woodlands, historic landscapes, a...
9 mi from route
~22 min detour
Free
near mile 25.1
The park represents the founding ideals of the nation, and preserves national and international symbols of freedom and democracy, including Independence Hall and the Liberty Bell. The Declaration of I...
Visit the house where wounded Polish freedom fighter Thaddeus Kosciuszko lived and hear how this brilliant military engineer designed successful fortifications during the American Revolution. See the...
14 mi from route
~36 min detour
Free
near mile 25.1
Famous as the First State to ratify the Constitution, Delaware was born out of a conflict among three world powers for dominance of the Delaware Valley. From this beginning, the region developed a dis...
25 mi from route
~63 min detour
Free
near mile 25.1
Park data from the National Park Service API. Alerts update every 2 hours.
More Details
What kind of drive is this?
About 25% of this drive is on highways, meaning you'll spend most of your time on surface roads. The longest continuous stretch on a highway is 261.1 miles along the Keystone Shortway. After that highway section, expect a significant shift to surface roads, which can mean more varied traffic and potentially more frequent intersections as you approach your destination.
Only 25% highway — the rest is turn-by-turn surface driving.
18 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 261.1 mi on Keystone Shortway.
How Hard Is This Drive?
10/10
Expect a hands-on drive with frequent turns and local roads rather than long highway stretches. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes around 1.6 miles in near Street Road.
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 16 significant decision points across 363.5 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 1.6 miles (Street Road): Lane positioning matters here; at 6.2 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one; at 6.8 miles: Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one.
Elevation Profile
Gently rolling terrain
1,676 ft26 ft
Total Climb
2,809 ft
Total Descent
1,570 ft
Highest Point
1,676 ft
~285.6 mi in
Elevation Range
1,650 ft
Towns Mentioned on Route Signs
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
Between Croydon, PA and Mercer, PA, road signs point toward Allentown and Mount Pocono.
Doable as a same-day drive at 6h 42m. Total distance: 363.5 miles.
Family Friendly
Moderate complexity with 1 natural rest stops along the way.
Solo Traveler
6h 42m drive, plan rest stops for pacing.
Scenic Drive
Mostly surface roads route profile with national parks nearby.
Frequently Asked Questions
The longest stretch is about 261.1 miles on Keystone Shortway. The full list of main roads is in the Roads section above.
Expect about $11.87 in tolls one way, starting with Pennsylvania Turnpike. Most Northeast and Midwest toll agencies accept E-ZPass; in the West and Texas, transponders like TxTag or FasTrak apply. If you do not have a transponder, cashless tolling plates will mail a bill to the vehicle's registered address — usually with a surcharge, so a rental-car toll pass is often cheaper than paying by mail.
Yes — we found about 35 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 Mercer, PA 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 35 rest areas along the route for bathroom stops.
The main spots that need attention: at 1.6 miles (Street Road): Lane positioning matters here; at 6.2 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one; at 6.8 miles: Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one.
Yes — Valley Forge National Historical Park, Independence National Historical Park and Thaddeus Kosciuszko National Memorial (4 total within detour distance). See the National Parks section for detour distances and tips on detours.
Not recommended in a single day. At 6.7 hours each way, a round trip means 13.4 hours of driving — that is an unsafe level of fatigue for most drivers. Plan at least one night at Mercer, PA before the return drive.
