Investigation of the Effects of Limited Ramp Closures along the H-1 Freeway.211 Volume 3. West Bound Lunalilo Street On-Ramp Closure: Justification, Design and 211 Analysis of Research Experiment

摘要

The focus of the research project is the central section of the H-1 Fwy. between211u001eKoko Head Ave. and Middle St., in Honolulu, Hawaii. The objective of the project 211u001eis the investigation of short-term actions to improve the flow of traffic. The 211u001eproject utilized FRESIM. INTEGRATION, KRONOS and TRANSYT-7F to identify ramps 211u001ethat impede the mainline flow and assess to the impact on both freeway and 211u001estreets should the ramps be modified. AUTOSCOPE speeds were used to calibrate the 211u001ebase-case models. This volume summarizes the 2-week experimental closure of the 211u001eLunalilo St. on-ramp in fall 1997. Simulation revealed that this on-ramp is the 211u001emost significant bottleneck on the west bound freeway and that its morning 211u001eclosure would result in substantial travel time savings to freeway users. The 211u001elocal geometry permits traffic from the on-ramp to continue onto the Vineyard 211u001eBlvd. off-ramp without entering the freeway. Overall, results showed strong 211u001epromise for long-term benefit. Although speeds initially dropped, by the last 211u001e(10th) day of the experiment, peak morning travel time on the freeway was 15% 211u001efaster than normal. Surveys were distributed to motorists at upstream on-ramps. 211u001eThe majority of the 1,120 respondents wanted the morning coning to continue and 211u001erelatively few disliked the experiment. About 1/4 of Lunalilo St. motorists liked 211u001ethe morning coning and 1/4 were neutral. Long-term experimental closure of this 211u001eramp with automated enforcement is recommended for week days and between 6:00 and 211u001e9:30 A.M.