Roadway Connectivity

Designing and constructing a roadway network with a high degree of connectivity is an important, efficient strategy for accommodating increased traffic. Connectivity is defined as the measurement of a system of streets with multiple routes and connections serving the same origins and destinations. Simply stated, a high degree of connectivity means there are many ways to get from Point A to Point B. An inter-connected roadway network can accommodate more travel demand than a roadway network with limited connectivity.

The traditional grid-style street layout provides excellent connectivity because streets are interlinked at numerous points, intersections are closely spaced, and there are few dead-ends. The presence of a grid pattern and alternate parallel streets allows the state highway and other major roads to serve their main purpose — moving vehicles over longer distances — while shorter trips can take place on local streets. However, suburban municipalities with individual, isolated cul-de-sac developments typically require access onto arterial streets, and often inhibit walking and bicycling by both adults and children. These suburban developments create congestion by overloading the limited number of intersections within the network. Typically, the best solution is to provide for a balance of increased connectivity with the opportunity for cul-de-sacs or dead-end streets where appropriate, and the use of traffic calming measures for reducing speeds and improving safety.


The potential benefits of roadway connectivity include:

Source: PennDOT Pub 731: Improving Connectivity and System Function Through Local Planning


Potential limitations of increasing roadway connectivity may include:

Source: PennDOT Pub 731: Improving Connectivity and System Function Through Local Planning

How To Use This Tool

Two resources that municipal officials should reference when planning for roadway connectivity include:

Both of these documents provide significant guidance for local municipalities by recommending various planning tools, measures and studies and provide case studies examining the pros and cons of development patterns in existing communities.


The following connectivity examples within Chester County municipalities are illustrated through a combination of historical aerial photos and planning documents:

Caln Township

G.O. Carlson Boulevard is planned to be an arterial collector street that runs parallel to the north and provides congestion relief from the heavily traveled Business Route 30. This roadway has been developed incrementally over time and will achieve full buildout with the completion of the final segment between Park Drive and Hidden Creek Drive. This continuous roadway is envisioned with the Future Transportation Plan element of the Caln Township's Comprehensive Plan.


East Caln Township

This example shows how East Caln Township officials utilized the Official Map for the development of Bell Tavern Road.

East Caln


This example shows how various roadway connections were developed in the vicinity of the PA 100/PA 113 intersection as part of a Master Plan/Land Development Process.


West Whiteland Township

This example illustrates how Commerce Drive was developed to provide connectivity around the PA 100 and Business Route 30 intersection.

West Whiteland

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