Transportation Plan - 2009, amended

6.3 Roadway Design Guidance, cont’d

Figure 6.8 Roadway Classifications and Typical Characteristics Roadway Classification Number of Lanes* Daily Traffic Volume*

Access Control* Land Use Service*

Posted Speeds*

Freeway

Four or Greater Two to Seven

40,000 or Greater 20,000 or Greater

High

None

50mph or Greater 45mph to 55mph 35mph to 45mph

Major Thoroughfare Minor Thoroughfare

Moderate

Low

Two to Five Two to Three Two to Three

10,000 to 40,000 Fair

Moderate

Collector

1,000 to 20,000

Low

Moderate-High 25mph to 40mph

Local

50 to 12,000

Very Low

High

15mph to 35mph

*Typical values, not hard definitions.

How these standards apply to Morrisville’s roadways is shown in Figure 6.10, and a more thorough and recommended set of roadway characteristics is presented in Figure 6.11. Figure 6.11 accom- modates some of the comments received throughout the planning process as well as being sensi- tive to the context of the area in which the roadway traverses. Safety is an external factor that must figure into the detailed design of all roadways; however, the sacrifice of safety in the name of gain- ing greater posted and design speeds should be resisted, as should compromising pedestrian and bicycle access in the name of increased motorized vehicular safety.

Figure 6.9 (A) Two-Lane Roadway

Figure 6.9 General Roadway Cross-Sections This figure includes several standard cross sections for Morrisville roads. Recommendations for specific roadways appear in Appendix E. Notes: 1. Right-of-way listed includes only through lanes. Additional right-of-way will be needed for turn lanes, transit stops, deceleration lanes and other infrastructure. 2. Curb & gutter and one foot on either side of the sidewalk are included in right-of-way total.

Figure 6.9 (B) Two-Lane Boulevard

Figure 6.9 (C) Four-Lane Roadway

Figure 6.9 (D) Four-Lane Boulevard

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6 Design Guidance