01050065

Component

https://doi.org/10.3141/2023-12

http://scholar.google.com...azzi&publication_year=2007

In this paper the influences of the ramp flow on the freeway flow are deemed invasive influences because the freeway vehicles’ priority is violated and the freeway flow is interrupted. Understanding of the invasive influences of the freeway entry process helps to promote efficient and safe operations of the main-line facility and to identify more straightforward indicators of level of service (LOS) for freeway on-ramp segments. First, on the basis of field observations conducted at three on-ramp sites along I-35 within the greater Kansas City, Kansas and Missouri, metropolitan area, ramp merging behavior of vehicles in platoons was identified as the direct cause of invasive influences on the freeway flow. Then, the significance of the invasive influences was evaluated in accordance with the evasive events performed by freeway drivers. These evasive events, instigated by merging conflicts, include slowdown and lane change actions. Finally, more straightforward LOS indicators were recommended for improving the current (2000) Highway Capacity Manual LOS evaluation procedure for freeway on-ramp segments.

01088318

English

pp 112-119

2007

Transportation Research Record: Journal of the Transportation Research Board

9780309104500

Print

Figures (5) ; References (25) ; Tables (1)

Freeway operations; Freeways; Highway capacity; Lane changing; Level of service; Merging traffic; On ramps; Traffic conflicts; Traffic flow

Highway Capacity Manual

Traffic slowdown

Kansas City Metropolitan Area

Highways; Operations and Traffic Management; I73: Traffic Control

TRIS, TRB, ATRI

Feb 8 2007 4:50PM

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