As part of this project, a number of surveillance flights were made using the Honolulu Fire Department helicopter in fall 1996. Images from this survey are available through the highlighted link above.
Prior experience with ramp closure analysis indicates that considerable mainline speed increases should be expected after the closure of ramps that cause excessive impedance to the mainline flow. Because of the high likelihood that ramp closure is beneficial, the project also includes the design of an experiment for a ramp closure.
TSIS-CORSIM, KRONOS, Integration and TRANSYT-7F were used extensively in
the analysis of freeway and mixed freeway/arterial networks. Several
portions of the simulations, model tests and results of this project have
been published
in Transportation Research Record, ITE Journal and TRB Conference
Proceedings.
Analysis of actual freeway data collected with video cameras and analyzed with AUTOSCOPE was conducted to gauge the proximity of freeway simulation results to reality (e.g., actual versus simulated speeds for a given level of flow at a given location). Also the accuracy of AUTOSCOPE, pneumatic counters and inductive loop detectors for volume data collection are being assessed.
A full-scale 2-week experiment of a ramp closure was conducted in the Fall of 1997. Extensive data collection on all ramps and many streets, as well as video recordings of freeway flow at 5 locations, helicopter video surveillance and post-closure motorist questionnaire surveys were used for impact assessment and evaluation.
A total of three technical reports were published from this project.
Extended executive summaries from each report are available by clicking
each of the links below.
Volume 1: PROJECT DESCRIPTION & WEST BOUND ANALYSIS
Volume 2: EAST BOUND H-1 FREEWAY
ANALYSES AND RECOMMENDATIONS