2001 Freeway System Deficiencies
The table listed below is a calculation of capacity deficiencies on the Hampton Roads area freeway system, utilizing Level of Service (LOS) and Volume-to-Capacity calculations based on the procedures listed in the 2000 Highway Capacity Manual and using traffic count data from the Virginia Department of Transportation.
This table lists those freeway segments that currently have an unacceptable Level of Service (E-F) or Volume-to-Capacity ratio (0.9+), and the minimum number of additional lanes that would be necessary to provide an acceptable level of service given 2001 traffic volumes.
|Route||Segment||# of lanes needed||Current LOS||Highest V/C ratio|
|US 58||Midtown Tunnel||2 each direction||F||1.54|
|I-64||VA 105/Fort Eustis Blvd to Bland Blvd||1 eastbound||E||0.89|
|I-64||Hampton Roads Center Pkwy to VA 134/Magruder Blvd||1 eastbound||E||0.87|
|I-64||VA 134/Magruder Blvd to I-664||1 each direction||E||1.06|
|I-64||I-664 to LaSalle Ave||1 eastbound||E||0.81|
|I-64||US 60/Settlers Landing Rd to VA 169/Mallory St||1 eastbound||F||1.09|
|I-64||VA 169/Mallory St to 15th View St (HRBT)||1 each direction||E||0.91|
|I-64||15th View St to 4th View St||1 eastbound||E||0.83|
|I-64||Bay Ave to I-564||1 eastbound||E||1.00|
|I-64||I-564 to VA 168/Tidewater Dr||1 each direction||E||0.98|
|I-64||VA 168/Tidewater Dr to VA 194/Chesapeake Blvd||1 westbound||E||0.94|
|I-64||VA 194/Chesapeake Blvd to I-264||1 each direction||E||1.08|
|I-64||I-464/Oak Grove Connector to US 17/Geo. Wash. Hwy||1 each direction||E||0.89|
|I-64||US 13/US 460/Military Hwy to I-264/664/Bowers Hill||1 each direction||E||0.84|
|I-264||VA 141/Effingham St to Tidewater Dr (Downtown Tunnel/Berkley Br.)||1 each direction||F||0.84|
|I-264||I-64 to Independence Blvd||2 each direction||E||1.09|
|I-264||Independence Blvd to Rosemont Rd||1 westbound||E||0.89|
- LOS calculations were done utilizing a Microsoft Excel spreadsheet
programmed with the formulas listed under Basic Freeway Sections in the 2000
Highway Capacity Manual.
- These calculations are for freeway sections between interchanges, and do not take interchange or weaving effects into consideration.
- Traffic volume counts, Design Hour Volume counts, and Percentage Trucks are taken from 2001 traffic data available from the Virginia Department of Transportation.
- Directional Split (the percentage split between traffic going one direction and the opposite direction on a given highway), where unknown, is assumed to be 60%.
- The assumed Peak Hour Factor used is 0.95.
- The number of through lanes was used to determine capacity level. Auxiliary lanes are not counted.
- Free Flow Speed is estimated, using an Ideal Free Flow Speed of the segment's speed limit plus 10 MPH. Sharp curves and tunnels on the system are given lower values.
- A Driver Population Factor of 1.0 was used.
*NOTE* The information on these tables is intended to be used for planning and comparison purposes only. This information is not endorsed by the Hampton Roads Planning District Commission or the Virginia Department of Transportation.
Comments on these calculations are welcomed. Future updates/pages will incorporate the impact accidents have on the system, based on HCM methodology, as well as how traffic volume increases will increase lane requirements.
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