In the U.S. 202 to I-476 section (Section FL1), I-76 will be widened in both the eastbound and westbound directions to accommodate the flex lanes and provide uniform shoulder widths in the active flex lane condition. While the amount of widening varies throughout the project limits, approximately 7 feet to 11 feet of roadway widening in each direction will occur, with a maximum of 25 feet occurring in the area of proposed emergency pull-offs. Please refer to the typical existing and proposed roadway cross sections depicting this widening on the FL1/FL3 Public Meeting page.
In the section west of Belmont to Route 1 (Section FL3), this widening is limited to the westbound direction only. Average widening through the FL3 Section is approximately 9.5 feet, with a maximum of 25 feet occurring in the area of proposed emergency pull-offs.
The flex lane installation is targeted for the segments of I-76 where key bottlenecks persist day-to-day. While a continuous flex lane is ultimately needed for the entire I-76 corridor, due to funding limitations, constructing the entire corridor is not feasible at this time.
The U.S. 202 to I-476 section (Section FL1) experiences bottlenecks along both directions of travel – westbound at the I-476 interchange, and eastbound at the U.S. 202/U.S. 422 entrance ramp. Installing the Flex Lane in Section FL1 westbound would nearly eliminate the bottlenecks at the I-476 interchange in the PM peak period and substantially alleviate those in the AM peak, except for the area near the U.S. 202 southbound/U.S. 422 westbound exit ramp. In the westbound direction, the flex lane will end in the area where I-76 currently widens from two to four lanes approaching U.S. 202/U.S. 422. Traffic traveling in the flex lane will not be required to merge back into the through travel lanes.
Similarly, installing the Flex Lane in Section FL1 eastbound would provide substantial relief for traffic entering I-76 from U.S. 202/U.S. 422, which continues as a dedicated I-76 lane when the Flex Lane is active. The trip patterns for I-76 eastbound traffic also indicate that approximately 75% of the traffic that originates at the PA Turnpike is destined for a location in Section FL1, further supporting the need for improvements in this section. The eastbound existing bottleneck east of the I-476 interchange would still persist; however, traffic using I-76 eastbound to access I-476 or Route 23 would likely experience less delay. This bottleneck would need to be addressed by the installation of a continuous flex lane.
For Section FL3, the westbound flex lane will begin just after the on-ramp from City Avenue and extend beyond the Belmont Avenue Interchange. There are two bottlenecks in this area that will be addressed by the flex lane installation. The first occurs at the City Avenue interchange, where I-76 westbound reduces to two travel lanes after several lane merges from the entrance ramps from City Avenue and Kelly Drive. The second bottleneck occurs at the entrance from Belmont Avenue.
During the AM peak, both bottlenecks are anticipated to be nearly eliminated. In the PM peak, the bottleneck at the City Avenue Interchange is anticipated to be substantially alleviated, except for the area west of Belmont Avenue. West of Belmont Avenue, when I-76 westbound narrows from three lanes (with an active Flex Lane) to two lanes, a new bottleneck would start to form during the PM peak. However, this bottleneck would not extend the entire distance back to the City Avenue Interchange and is only anticipated in the PM peak period. Providing the flex lane would allow traffic easier access to destinations such as the City Avenue and Belmont Avenue interchanges.
When a PennDOT transportation improvement project is planned and programmed, it generally moves through three major phases of implementation – Preliminary Engineering, Final Design, and Construction.
During the Preliminary Engineering phase, critical activities related to surveying, geometry establishment, environmental studies, traffic analysis, and public involvement are performed to allow the project to advance to the Final Design phase.
Projects receiving federal funding, such as these I-76 Section FL1 and FL3 projects, also require clearance under the requirements of the National Environmental Policy Act (NEPA) to advance into Final Design.
During Final Design, the project footprint established during Preliminary Engineering will be further refined to reduce impacts to the extent practical while meeting the project’s purpose and need. Final design activities also include permitting, environmental mitigation, right-of-way acquisition, and utility coordination.
The Final Design for I-76 Sections FL1 and FL3 is anticipated to begin in summer 2025.
PennDOT’s Project Level Highway Traffic Noise Handbook provides the procedures and guidance regarding highway traffic noise assessments and analysis for projects such as this one. PennDOT follows a 7-step process:
Step 1 – Initial Project Level Scoping and Determining the Appropriate Level of Noise Analysis
Step 2 – Noise Analysis Procedures (field monitoring and modeling)
Step 3 – Determining Highway Traffic Noise Impacts and Establishing Abatement Requirements
Step 4 – Additional Considerations for Final Design Noise Barrier Analysis
Step 5 – Construction Noise Consideration
Step 6 – Public, Municipality, and Agency Involvement
Step 7 – Reporting Results of Highway Traffic Noise Analysis
The project has recently completed the preliminary noise analysis (Step 3). It is estimated that Step 4 would begin in summer 2025. Further coordination with property owners that would benefit from noise abatement will occur later in Final Design. Public coordination and feedback with respect to noise abatement (Step 6) occurs during Final Design after the analysis is refined with the final design highway geometry details.
Additional information regarding PennDOT/FHWA traffic noise policy can be found here:
All phases for this project are currently programmed on the Delaware Valley Regional Planning Commission (DVRPC) Transportation Improvement Program (TIP) and Twelve-Year Program (TYP). Funding is programmed on both the Interstate Management Program for the DVRPC Subregion and on the Regional Program for Montgomery County. The amounts programmed are based on preliminary design estimates for the project.
The variable speed limit and queue warning system has been constructed and is now active. The rest of the project, including the Flex Lanes, is currently moving into Final Design. Please click here to view the project schedule.
The construction start dates are estimated based on the anticipated timeframes needed to complete Final Design, utility coordination, right-of-way acquisition, and permitting for the project. The schedule will be updated as Final Design progresses and is subject to change.
The Department is investigating stormwater improvements along the corridor as part of the project. With the widening of the roadway, the existing closed system conveyance system will be extended and supplemented to promote efficient drainage and limit the spread of stormwater runoff into the travel lanes to the extent practical.
Coordination with PADEP and the local County Conservation District is ongoing regarding stormwater management. Under the regulations set by PADEP under Title 25 of the Pennsylvania Code, the project will require a National Pollutant Discharge Elimination System (NPDES) permit.
The primary goal of these regulations is to protect surface waters from sediment and stormwater pollution through the use of best management practices (BMPs) that minimize erosion and manage stormwater runoff during and after earth disturbance activities. The project will adhere to all agency and local requirements for controlling accelerated erosion and preventing sediment pollution from earth disturbance activities during construction and guidelines for managing post-construction stormwater runoff to protect water quality.
When not in use, the flex lane would operate similarly to a highway shoulder and would be available for vehicles to pull over if needed. Traveling in the closed lane (shoulder) would be enforceable by the Pennsylvania State Police.
The proposed emergency pull-off locations will provide the ability for the Pennsylvania State Police to more safely monitor and enforce the traffic laws along I-76. Weather conditions will be considered when opening or closing the flex lane on I-76, and this will be controlled by PennDOT’s Regional Traffic Management Center.
The Emergency Access Ramps are intended for infrequent, as-needed use for response during emergencies/incidents along I-76. During the active flex lane condition, lack of a full shoulder on I-76 limits the ability of emergency responders to access the incident location(s).
The ramps will be gated, locked, and accessible only by authorized emergency and maintenance personnel. Specific details related to the design of the gate will be determined during Final Design.
Several emergency access ramp locations and alternates were studied during Preliminary Engineering. These authorized-use only, gated access points needed to be located at practical locations along the corridor and roadways that cross over or under I-76, offering the best access for area emergency responders, PennDOT, etc.
While the westbound access road near Weadley Road needed to be extended to South Gulph Road due to the geometric constraints and topography, the eastbound access road was designed to connect to Weadley Road just south of I-76. PennDOT intends to further refine the design of this access road to minimize associated property and environmental impacts to the extent practical during Final Design.
The Emergency Access Ramps will be gated and signed appropriately to prevent drivers from entering. Noise walls (where proposed) and fencing along the highway property lines will further secure this area and separate it from local properties and roadways.
Pedestrians and non-motorized vehicles are prohibited on I-76. Details related to the fencing along the new limited access right-of-way line or potential noise barriers along the Emergency Access Ramp on the residential side will be refined during Final Design and coordinated with adjacent property owners as needed.
Permanent easements (i.e., slope easements and drainage easements) are legal rights granted to PennDOT to use a portion of private property for transportation-related purposes. These easements are essential for the construction, maintenance, and operation of highways, bridges, and other transportation infrastructure. There are several existing permanent easement locations in place along the I-76 corridor in Sections FL1 and FL3. These boundaries were depicted on the roll plans available at the public meetings and posted to the project website.
Temporary Construction Easements (TCEs) are legal agreements granting PennDOT the right to use a portion of private property for a specific period to facilitate construction activities. Unlike permanent easements, TCEs are limited in duration and scope, expiring once the construction project is completed and the area is satisfactorily restored to its pre-construction condition.
Permanent and temporary easements associated with this project will be finalized in Final Design. If a permanent or temporary easement is required on your property, you are entitled to compensation.
PennDOT is required to offer “just compensation” for the acquisition of any property necessary to construct the project. If an impact in the form of partial/total acquisition or permanent/temporary easement is identified during Final Design, the Department will contact the property owner(s) to inform them of the exact nature of the impacts.
The full property parcel bounds and extents of the proposed impacts will be accurately drafted on a proposed engineering plot plan and provided to the owner. Qualified appraisers will then assess the value of the property to determine fair compensation to offset the impacts.
PennDOT will then negotiate with the property owner(s) to reach an agreement on compensation and terms of acquisition. Once an agreement is reached, PennDOT acquires the property through purchase or, if necessary, eminent domain. In the case of total property acquisition, PennDOT provides assistance to displaced property owner(s) and tenant(s) to help them relocate.
This process ensures that property owners are fairly compensated and that transportation improvement projects can proceed efficiently and legally. This process is currently anticipated to begin in late 2025 for impacted properties.
Each overhead bridge replacement in Section FL1 (Weadley Road, Gypsy Lane, and Spring Garden Street) is anticipated to be completed in one construction season, or about a calendar year. Although the planned detour routes for the Weadley Road and Gypsy Lane bridge replacements do not overlap, it is understood that when motorists are unable to utilize one crossing, they will seek to use the other. The construction of these two bridges will likely be staggered to accommodate local motorists traveling through the project area.
For Section FL3, there are no detours currently planned for the project.
The I-76 ICM includes flex lanes, active traffic management, parallel signal corridor improvements, and multimodal improvements. Please click here for more information on these components.
Flex lanes are initially being designed on two sections of I-76: Westbound from U.S. 1 to just west of Belmont Avenue and in both directions from U.S. 202 to just east of I-476. The U.S. 1 interchange in the westbound direction was found to be one of the largest traffic bottlenecks in the region and our analysis to date indicates that the implementation of flex lanes in this area will provide significant congestion relief. The area between King of Prussia and I-476 is already wider than other areas of the corridor and connects two major interchanges (I-476 and US 202/US 422) where traffic enters and departs the highway, making this area a good candidate to pilot a flex lane solution. While not currently under design, future flex lane implementation in other areas of I-76 is still being studied.
Traditional capacity adding strategies have proved infeasible along the I-76 corridor due to geometric and funding constraints. PennDOT is taking an innovative systems approach to managing transportation in the corridor through the application of flexible capacity, technology, and multimodal coordination.
Variable speed limit signs and a queue detection and warning system were the first strategies deployed. This system was activated in spring 2021. PennDOT also continues to upgrade and integrate traffic signals into their central control system along key arterial routes near I-76.
Information will be posted on this website as the project progresses.
If you encounter potholes and other maintenance concerns at any time on Pennsylvania’s roadways, simply call PennDOT’s toll-free Roadway Maintenance Hotline, 800-FIX-ROAD, or visit PennDOT’s Customer Care Center website to report the problem and its location. We’ll take it from there.
SEPTA is a key partner in the I-76 ICM project. PennDOT is working with SEPTA to make transit service more attractive in this corridor.
Information will be posted on this website as the project progresses.
If you encounter potholes and other maintenance concerns at any time on Pennsylvania’s roadways, simply call PennDOT’s toll-free Roadway Maintenance Hotline, 800-FIX-ROAD, or visit PennDOT’s Customer Care Center website to report the problem and its location. We’ll take it from there.
SEPTA is a key partner in the I-76 ICM project. PennDOT is working with SEPTA to make transit service more attractive in this corridor.
