Post Oak Rest Area Southbound – I-57
Looking for a break on I-57 southbound near Selmaville, Illinois? Post Oak Rest Area is along the way. Reported truck parking: 18 spaces. The next southbound stop is Rend Lake Rest Area, about 35 miles further along I-57.
Location map
Marker shows recorded coordinates, not an entrance or approved driving route. Follow highway signs.
Open directionsReported parking capacity
Reported capacity from the 2019 federal truck parking survey (FHWA Jason's Law). This is not real-time vacancy information.
Facilities and amenities
Unknown (not documented in the sources): Family restroom, Accessible facilities, Picnic tables, Pet area, Public phone, RV dump station, EV charging, Wi-Fi.
A reported facility does not guarantee current availability.
About this rest area
The Post Oak Rest Area serves southbound traffic on Interstate 57 near Selmaville, Illinois. Its current operating status has not been verified. Confirm the current situation with the Illinois Department of Transportation before you plan a break here.
Location and driving direction
This is the southbound facility on I-57, near Selmaville. The recorded position is around mile marker 114.
Do not confuse it with the separate northbound facility, Post Oak Rest Area, on the other side of the highway.
The next southbound stop is Rend Lake Rest Area, about 35 miles further along I-57.
Parking and amenities
Truck parking: 18 reported spaces (the 2019 federal truck parking survey (FHWA Jason's Law)).
Facilities reported for this location:
- Restrooms
- Drinking water
- Vending machines
Space counts describe reported capacity, not live parking availability. Individual facilities can be closed temporarily.
How long can you stay?
Illinois limits stays at rest areas to 3 hours for all vehicles; a shorter limit can be posted when a rest area is full. Tollway oases have their own rules. Posted signs at this rest area can set a different limit. Source: 92 Ill. Adm. Code 533.20 (checked November 2026).
Map and coordinates
Recorded coordinates: 38.596681, -88.967714. Use them as a reference only; follow the posted signs to the entrance.
Frequently asked questions
Is this rest area on I-57 Southbound?
Yes. The federal truck parking inventory record identifies it as the southbound facility on Interstate 57 near Selmaville. The northbound lanes have a separate facility.
Can trucks park here?
The 2019 federal truck parking survey (FHWA Jason's Law) lists 18 truck parking spaces at this facility. This does not indicate how many are currently free.
Are there restrooms and drinking water?
Yes, both are included in the official amenities listing. Check current conditions before travel.
How long can I park here?
Illinois limits stays at rest areas to 3 hours for all vehicles; a shorter limit can be posted when a rest area is full. Tollway oases have their own rules. Posted signs on site apply.
Where is the next rest stop?
Rend Lake Rest Area, about 35 miles further along I-57 by the official mile markers.