49 / 105
45
6
Design Guidance
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 (B)
Two-Lane Boulevard
Figure 6.9 (C) Four-Lane Roadway
Figure 6.9 (D)
Four-Lane Boulevard
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
40,000 or Greater
High
None
50mph or Greater
Major Thoroughfare
Two to Seven
20,000 or Greater
Moderate
Low
45mph to 55mph
Minor Thoroughfare
Two to Five
10,000 to 40,000 Fair
Moderate
35mph to 45mph
Collector
Two to Three
1,000 to 20,000
Low
Moderate-High 25mph to 40mph
Local
Two to Three
50 to 12,000
Very Low
High
15mph to 35mph
*Typical values, not hard definitions.
6.3 Roadway Design Guidance, cont’d
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.