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Road Diet Projects

What is an Action?


An Action is the smallest, most concrete recommendation made in the Master Plan. An Action can be a policy, project, program, partnership, plan, study, or advocacy position. They can be City lead or sponsored by outside organizations. Actions are combined in Initiatives to achieve Goals.

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A typical Road Diet converts an existing four-lane undivided roadway segment to a three-lane segment consisting of two through lanes and a center two-way left-turn lane (TWLTL). This reduction of lanes allows for other uses such as bike lanes, pedestrian refuge islands, transit stops, or parking. A Road Diet is one of the Federal Highway Administrations Proven Safety Countermeasures (, and can reduce crash rates compared to a traditional four-lane undivided roadway.

roaddiet safety

roaddiet safety

roaddiet typicalconversion

roaddiet typicalconversion
The City of Trenton should identify and study locations for Road Diets. Excessive width was noted on Southard and Perry Streets. South Broad Street in Chambersburg could receive the typical road diet conversion to a 3-lane section (east of Liberty Street). West State Street, between Lee Ave and Overbrook Ave, should be converted to a 3-lane section with bike lanes. Road conversions can happen when roadways are ready for resurfacing and restriping as part of a maintenance program.
Broad Street and Warren Street through the downtown are multi-lane one-way roadways. These streets should be studied to determine if they could be dieted slightly to add additional on-street parking or bike lanes. There are plans to add a bicycle loop on these streets; converting roadway space to bicycle lanes will help make these complete streets (See Wellness Loop Project). Alternatively, these streets could be converted to two-way roadways to aid in circulation (See Street Naming and One-Way Street Consolidation Study).

broad warren oblique

broad warren oblique

roaddiet candidatemap

roaddiet candidatemap
Implementation of road diet conversions should be coordinated with the City’s Capital Improvement Plan or Maintenance Programs. Projects that only involve restriping could be completed as part of scheduled resurfacing. More involved projects could apply for Highway Safety Improvement Program (HSIP) funding. Perry Street is an HSIP-Eligible Local Road Location. Among Pedestrian Safety Corridors, it is ranked 41st in Mercer County, and 124th in the DVRPC region (DVRPC’s HSIP-Eligible Local Road Locations[1]). The intersection of Perry Street and Southard Street is also listed as a high crash location.

Case Study: Woodbury, New Jersey

Four-lane undivided highways have a history of relatively high crash rates, especially as traffic volumes and turning movements increase. A principal cause is that the left, or inside lane is shared by higher-speed through traffic and left-turning vehicles. The Federal Highway Administration (FHWA) has recognized road diets as a proven safety countermeasure, as they have been shown to reduce the number of vehicle-to-vehicle conflict points that contribute to rear-end, left-turn and sideswipe crashes, provide safer facilities for bicyclists and pedestrians, manage speeds and improve a community's livability. Road diets are becoming standard practice across the country. Communities in many states, including New Jersey, have implemented road diets and realized their benefits. Because most road diets can be installed on existing pavement within the right of way, they can be a low cost way for a community to achieve many goals.
The New Jersey Department of Transportation (NJDOT) supports creating road diets on state system where appropriate. In the last five years, 47 road diets have been undertaken on state, county or local roads in New Jersey, and over 70% of this number have been constructed and operational. NJDOT prepared this video to provide information on how road diets work, and the benefits they provide, using case studies of implemented road diets in some of New Jersey's county, town and shore environments.
Details of Road Diet Projects



Supporting Departments:

Department Of Public Works


Parking Authority

Partnering Organizations:


Mercer County



$30,000 per study


Maintenance For Restriping Projects

Hsip Funding For More Involved Projects



Topic Focused Report:


Land Use