01049595

Component

The number of lanes requires for freeway design on uniform upgrade is examined on a unified computational framework by integrating together heavy vehicles characteristics, road geometry, traffic flow theory, and traffic compositions. Two important parameters are introduced to characterize the formation and propagation of queues initiated by slow trucks on uniform upgrade under two realistic conditions. Important design criteria are derived and computed on physical bases to show the interesting interrelation among these factors on freeway design. Typical examples are presented to illustrate the proposed computational framework in contrast to the conventional strategies recommended by HCM guideline. These criteria should be considered carefully by engineers to avoid recurrent traffic congestion initiated at certain locations of freeways where an uphill road section is to be constructed, rehabilitated, or widened for smoothing traffic operations.

01042056

07-2924

English

14p

2007

Transportation Research Board 86th Annual Meeting

CD-ROM

Figures (6) ; References (11) ; Tables (6)

Heavy vehicles; Highway capacity; Highway design; Highway operations; Operations; Traffic flow; Traffic lanes; Vehicle mix

Highway Capacity Manual

Highway geometrics; Travel lanes

Administration and Management; Highways; Operations and Traffic Management; Planning and Forecasting; I72: Traffic and Transport Planning

Transportation Research Board Annual Meeting 2007 Paper #07-2924

TRIS, TRB

Feb 8 2007 7:38PM