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Highways and Highway Components Highway Transportation Characteristics.

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Presentation on theme: "Highways and Highway Components Highway Transportation Characteristics."— Presentation transcript:

1 Highways and Highway Components Highway Transportation Characteristics

2 Outline Functional classification of roads Road functions Hierarchical structure of road networks Mobility vs. accessibility Mobility vs. transportation mode Highway components Cross-sections Highway plan and profile Interchanges Rural and urban intersections

3 Road Functions Mobility Accessibility

4 Hierarchical Structure of Road Networks Rural Urban

5 Mobility vs. Accessibility Road ClassRoad Function Freeways Through movement exclusively Surface Arterials Through movement primary and some land access Collectors Traffic movement to higher rank roads, access to abutting properties Local Roads Access to abutting land and local traffic movement

6 Hierarchical Structure of Road Networks

7 Mobility vs. Accessibility

8 Mobility vs. Transportation Mode

9 Mobility vs. Transportation Mode Capacity capacity in veh/h = capacity in veh/h/lane x number of lanes capacity in persons/h = capacity in veh/h x average vehicle occupancy

10 Mobility vs. Transportation Mode Capacity Persons/hrVehicles/hrFacility 6,000 x 1.7 = 10,2002,000 x 3 = 6,000Three-lane urban freeway 2,400 x 1.7 = 4, x 3 = 2,400Three-lane urban arterial 100 x 80 = 8, x 1 =100One lane of buses 19,000One track of light rail 40,000One track of heavy rail

11 Mobility vs. Transportation Mode Capacity

12 Highway Components Cross-section

13 Highway Components Highway plan and profile

14 Highway Components Urban Intersections Picture Picture

15 Highway Components Rural Intersections Picture Picture

16 Highway Components Interchanges Diamond Cloverleave Urban directional Diamond Cloverleave Urban directional


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