Comprehensive Transportation Plan - March 2019

ROADWAYS

INTERSECTION-LEVEL IMPROVEMENTS Recommendations for the future system include improvements to critical intersections and interchanges. These locations were identified due to operational deficiencies and safety concerns, evaluated based on crash data from a three-year period as well as feedback from the public and stakeholders. Additional details on intersection improvements and appropriate countermeasures will need to be determined through more in-depth safety and traffic analyses as the project progresses to design and construction. Table 3-5 includes the list of intersections recommended for improvement. These recommendations are in addition to those already included as committed improvements. Best Practices: Safety Improvements Enhancing travel safety is an important outcome of any long-range transportation plan. Through consultation with local officials, residents, and Town staff, the Town of Morrisville Comprehensive Transportation Plan identified intersections for safety improvements. Though the ultimate redesign of an intersection will have to be finalized after a detailed study, there are several standard countermeasures to improve safety and operations. The intersections listed in Table 3-5 warrant further study, and countermeasures other than those listed in Table 3-4 may be studied and recommended. While not a comprehensive list of all improvement countermeasures, standard intersection improvement countermeasures are listed in Table 3-4 . Table 3-4: Standard Intersection Improvement Countermeasures COUNTERMEASURE DESCRIPTION Realignment Roadways are realigned to meet as close to a 90-degree angle as possible. This improves visibility and turning radius.

Some non-signalized intersections may be eligible for a traffic signal based on full evaluation of the nine MUTCD signal warrants. The signal warrants covered in Chapter 4C of the MUTCD include a variety of factors such as vehicular volume, pedestrian volume, and crash history. Often the danger to pedestrians and bicycles can be reduced by providing improved crossing facilities, such as painted crosswalks and median refuges. Replacing a traditional intersection with a roundabout reduces the number of serious crashes while improving traffic flow. Turn lanes allow space for vehicles waiting to turn and reduces the risk of rear-end crashes. Curb cuts that are too close to an intersection are consolidated or relocated to reduce the number of turning movements or potential crashes. Providing advanced warning signs or installing reflective backplates on traffic signals can reduce crashes due to reduced visibility. RCUT intersections, also sometimes referred to as super street intersections, work by redirecting left-turn and through movements from the side street approaches. These movements are accommodated by making a right turn followed by a U-turn maneuver at a median opening downstream. RCUT intersections can improve efficiency and safety of roadways.

Signalization

Improved Crossings

Roundabouts

Turn Lanes

Driveway Consolidation

Improve/Advance Signage

Restricted Crossing U-Turn Intersection (RCUT)

Table 3-5: Intersection-Level Improvements CORRIDOR

IMPROVEMENT

Airport Boulevard & NC 54 Grade Separation Crabtree Crossing Parkway & Morrisville Parkway Intersection Improvements

Intersection Improvements Intersection Improvements Intersection Improvements Intersection Improvements Intersection Improvements At-Grade Improvements Intersection Improvements Intersection Improvements Intersection Improvements Intersection Improvements Grade Separation

Davis Drive & McCrimmon Parkway Davis Drive & Parkside Valley Drive Davis Drive & Morrisville-Carpenter Road Davis Drive & Morrisville Parkway McCrimmon Parkway & Church Street Morrisville-Carpenter Road & NC 54 Morrisville-Carpenter Road & NC 54

NC 54 & Keybridge Drive NC 54 & Morrisville Parkway NC 54 & NW Cary Parkway

Slater Road & Carrington Mill Boulevard

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