Connecticut Parkway Vehicle Guide
Can a Pickup or Trailer Use Route 15 in Connecticut?
Route 15 includes the Merritt and Wilbur Cross parkways, where vehicle type, registration, dimensions and trailers matter. The simplest rule is exact: all trailers are prohibited on these parkways.
The direct answer
A pickup may use the Merritt, Wilbur Cross and Milford parkways if it has passenger registration and stays within the published size limits. A vehicle with combination plates has an additional 7,500-pound gross-weight condition plus size limits. All trailers are prohibited. Box trucks, tractor trailers, RVs, campers and rental trucks are also prohibited under CTDOT’s current public guidance.
Passenger-plated pickup
Allowed if it stays within CTDOT’s height, length and width limits.
Combination plates
Not allowed unless total gross weight is 7,500 lb. or less and dimensions comply.
Any trailer
Prohibited on the Merritt, Wilbur Cross and Milford parkways.
When unsure
Use a legal alternate route; navigation apps do not determine compliance.
CTDOT’s current public parkway rules
This applies to the Merritt Parkway, Wilbur Cross Parkway and Milford Parkway. Always obey posted signs and current official guidance.
| Vehicle or combination | Current public guidance | Critical condition |
|---|---|---|
| Passenger car | Allowed. | Must remain within size limits. |
| Pickup with passenger registration | Allowed. | Must remain within size limits. |
| Combination-plated vehicle | Conditional. | Gross weight including contents 7,500 lb. or less, plus size limits. |
| Vehicle towing any trailer | Prohibited. | All trailers are prohibited. |
| RV or camper | Prohibited. | Do not route onto the parkways. |
| Rental truck | Prohibited. | Includes common moving/home-improvement rental trucks. |
| Box truck or tractor trailer | Prohibited. | Use an appropriate alternate route. |
What are the parkway size limits?
CTDOT says a vehicle cannot use these parkways if it is more than 8 feet high, 24 feet long or 7 feet 6 inches wide, excluding mirrors. These are maximum boundaries, not a promise that every bridge or condition feels generous. Added roof cargo, racks, equipment and load can change the vehicle’s dimensions.
Can I tow a boat, camper or utility trailer on Route 15?
No on the controlled parkway sections identified by CTDOT. The state’s guidance says all trailers are prohibited on the Merritt, Wilbur Cross and Milford parkways. Plan a route using permitted interstates and state roads before departure. Do not rely on a passenger-car navigation setting.
What about a pickup with combination plates?
CTDOT says combination-plated vehicles are prohibited unless gross vehicle weight—including contents—is 7,500 pounds or less and the vehicle stays within the stated height, length and width limits. “Gross weight†here is not just empty curb weight. Check registration, actual load and official guidance.
What should I do if I enter by mistake?
CTDOT instructs drivers of prohibited vehicles to turn on hazard lights, pull completely out of the travel way to a shoulder or roadside area, and call 911 for help exiting. Do not reverse, stop in a live lane or attempt a risky turnaround.
Route planning for truck owners near Wallingford
Route 15 is convenient, which is exactly why a trailer-safe plan should be made before the truck is moving. Use an alternate route appropriate for the vehicle and load, verify bridge heights and local restrictions, and remember that town roads may have separate through-truck rules. The driver remains responsible for signs and legal routing.
Before using a Connecticut parkway
- Identify the exact roadway: Merritt, Wilbur Cross or Milford Parkway.
- Confirm passenger or combination registration type.
- Do not enter with any trailer, RV, camper or rental truck.
- Measure loaded height, overall length and width excluding mirrors.
- For combination plates, confirm total gross weight including contents.
- Remove the passenger-car default from navigation when towing.
- Obey posted signs even if an app suggests the route.
- Check CTDOT’s page again before a time-sensitive trip.
Frequently asked questions
Can a pickup truck drive on the Merritt Parkway?
Yes, CTDOT says a pickup is allowed if it has passenger registration and remains within the stated height, length and width limits.
Can a pickup with combination plates use Route 15?
Only if the gross vehicle weight including contents is 7,500 pounds or less and it stays within the size limits, under CTDOT’s current guidance.
Can I tow a small utility trailer on the Merritt Parkway?
No. CTDOT says all trailers are prohibited, regardless of size.
Are campers and RVs allowed on the Wilbur Cross Parkway?
No. CTDOT lists RVs and campers as prohibited.
What are the maximum parkway dimensions?
CTDOT lists maximums of 8 feet high, 24 feet long and 7 feet 6 inches wide, excluding mirrors.
What should I do if I enter the parkway with a prohibited vehicle?
CTDOT says to use hazard lights, pull completely out of the travel way and call 911 for assistance exiting.
Choose the truck—and the route—for the real job
If towing is part of your truck decision, bring the loaded trailer numbers and regular routes. We can help identify the right GMC configuration and labels to verify.
Sources and methodology
This page was drafted and materially reviewed September 16, 2026. Claims were checked against official manufacturer or government sources. Specifications, programs, taxes, road rules, service plans and inventory can change; confirm the current document, exact VIN, vehicle label, contract or agency guidance before acting.
- Connecticut DOT: Parkway restrictions and FAQs
- Connecticut DOT: Roads and highways travel resources
- Connecticut DOT: Through-truck routes and prohibitions
- Connecticut DOT: “Check Your Height, Know It’s Rightâ€
Wallingford GMC provides general vehicle-shopping and ownership information, not legal, tax or financial advice. Safety-critical decisions must follow the applicable Owner’s Manual, vehicle labels, contract and current government rules.