Our Traffic and Transportation Department partners with clients to deliver smart, sustainable transportation solutions that keep communities moving efficiently. From early planning to final construction, we design strategies that improve mobility, enhance user experience, and meet local standards across Pennsylvania, New Jersey, and Delaware. Whether working with municipalities, state agencies, or private developers, we provide practical, future-ready answers tailored to your unique needs.

Meet Our Traffic & Transportation Department

Peter O’Halloran, P.E., PTOE, manages our Traffic and Transportation Engineering Department with over 24 years of experience in transportation design and planning. He specializes in signal design, traffic studies, and multimodal solutions for municipalities, state agencies, school districts, and private developers across the region. Peter’s expertise spans all phases of a project—from concept to construction—ensuring safe, efficient, and sustainable transportation systems tailored to community needs.

“A lot of our work comes from supporting other departments when their projects have a traffic component. We also pursue traffic-specific projects with the same clients, so collaboration is a big part of what we do.”

— Peter O’Halloran, P.E., PTOE

Helping Peter to take on traffic work are Susan Phillips, P.E.,A.I.C.P., and Tony Zhu, E.I.T., as well as our most recent hires Deana Plett and Joshua McGonagle, E.I.T.. We are proud to highlight that we have been focusing on growing our traffic and transportation department and its personnel to be able to further support both current and future client needs.

What Sets Us Apart

Our approach goes beyond technical design—we focus on relationships, responsiveness, and advocacy for our clients.

“Part of our philosophy is maintaining strong relationships with PennDOT and their reviewers. When we need to push back on a comment that could add unnecessary cost for a client, having that mutual respect allows for real dialogue. That helps us serve our clients better.”

— Peter O’Halloran, P.E., PTOE

This commitment means:

• Proactive Agency Coordination: We work closely with PennDOT and local reviewers to streamline approvals and resolve issues quickly.
• Client Advocacy: We don’t just “check the box”—we look for cost-effective solutions and push back when redesigns aren’t justified.
• Community Awareness: In regions like the Lehigh Valley, where warehouse development is booming, we balance township concerns with developer needs.

Our Process

1. Discovery & Alignment: Early coordination with municipalities, developers, and agencies to set clear goals.
2. Data-Driven Analysis: Turning traffic counts and crash data into actionable insights.
3. Context-Sensitive Design: Solutions that fit the corridor—signals, roundabouts, traffic calming, bike/ped facilities, ADA compliance.
4. Permitting & Compliance: Navigating HOP/TSP efficiently with complete, code-aligned submissions.
5. Constructability & Safety: Maintenance and Protection of Traffic plans that keep workers and users safe.
6. Performance Monitoring: Post-construction signal timing and optimization to maintain efficiency.

Featured Projects

Freemansburg Borough Main Street Reconstruction Project

In our role as Municipal Engineer, Carroll Engineering was responsible for the comprehensive design and oversight of the Freemansburg Borough Main Street Reconstruction Project. The existing roadway exhibited aging infrastructure, inadequate stormwater management, and limited pedestrian accommodations, which posed safety and accessibility challenges for both motorists and pedestrians. To address these issues, Carroll Engineering began by performing detailed topographic and boundary surveys to establish accurate existing conditions. Our roadway design incorporated improved traffic safety features, including updated lane configurations and signage, to enhance vehicular flow and reduce conflict points. In addition, a new storm sewer system was designed to mitigate flooding and improve long-term drainage performance. Utility coordination was a critical component of the project, requiring close collaboration with multiple service providers to minimize disruptions and ensure seamless integration of underground facilities. Public engagement was prioritized through a series of project meetings, allowing stakeholders to provide input and remain informed throughout the design process. The reconstruction also included a new lighting layout to improve nighttime visibility, landscaping enhancements to beautify the corridor, and full compliance with ADA accessibility standards to accommodate all users. Carroll Engineering provided Construction Observation services during implementation to ensure adherence to design specifications and quality standards. The completed project delivers a safer, more efficient, and aesthetically pleasing Main Street corridor for the community.

Butztown Road Realignment 

As the municipal engineer, Carroll Engineering is in the process of redesigning the T-intersection of Nazareth Pike (SR 0191) and Butztown Road in Lower Nazareth Township, PA. The existing T-intersection is one-way stop controlled with a stop sign on Butztown Road. In addition, the angle of intersection between the two roadways is quite acute, which can cause sight distance deficiencies for drivers on Butztown Road who wish to turn onto Nazareth Pike. Because of this condition, drivers frequently use the paved triangle in between the two roadways as an auxiliary roadway from which to make turns. CEC’s design will see the intersection realigned into a more traditional perpendicular t-intersection. In addition, a left-turn lane from southbound Nazareth Pike will be constructed for drivers turning onto Butztown Road. As part of the design, an overflow parking lot will be created in the existing paved area between the two roadways. CEC has been coordinating with the Township and PennDOT to accommodate all stakeholder feedback into the design to the maximum extent feasible.

Let’s Build Together

Whether you’re planning infrastructure improvements, seeking permits, or optimizing existing corridors, our team can help you move forward with confidence. Please contact Peter O’Halloran, P.E., P.T.O.E., at (215) 987-4863 or pohalloran@carrollengineering.com.