PURPOSE • Status: The PEL has been paused. • Take advantage of the pause. • Develop a community solution for the US 20 Ashton to SH 87 highway design. • A solution the majority can support. • Plan a path forward for the community solution. CURRENT/PROPOSED IMPROVEMENTS • stripes • Improved signage • Improved highway paint/turning arrows • Solar lighting at wildlife areas • Message boards warning of hazardsTree cut back – continue north to the flats • Shoulder rumble strips • Center rumble strips • Widening the shoulders • Wider • Speed limits: reduced and consistent? • EMBRACE THESE IMPROVEMENTS? SUPER 2 HIGHWAY • Unanimous Support at Community Meeting #1 • Used In Many States • 4 ITD Studies • DKS & Associates - 2008 • Kittelson & Associates - 2016 • JUB Engineers $3.5M, 2020 - Prioritize passing lanes (JUB did this, Sheep Creek to Mack’s Inn only) • BYU Study – Ashton Hills Estates - 2021 • Horrocks Engineers - 2022 • Features • Wide lanes • Wide shoulders • Alternating passing lanes • Reduce access • Much lower cost SUPER 2 PHOTO SUPER 2 HIGHWAY SAFETY The objective of this study was to evaluate the safety effectiveness of Super 2 highways in Texas. A before–after study was performed with the empirical Bayes (EB) method, which was superior to other methods because it could address the regression-to-the-mean bias. On the basis of potential study sites identified in seven districts (Paris, Childress, Corpus Christi, Austin, Wichita Falls, Yoakum, and Bryan) in Texas, four reference groups were considered by imposition of different restrictions. Negative binomial regression models were then used to develop safety performance functions for each reference group. From the model selection process, the most restricted reference group was selected for the final analysis. For roadway inventory and crash history data, 12 years (1997 to 2001 and 2003 to 2009) of data for Texas were examined. The analysis used fatal (K), incapacitating injury (A), non-incapacitating injury (B), and minor injury (C) crashes. Property-damage-only crashes were not included. The EB analyses were carried out on five corridors with about 53 centerline miles. The results showed that the installation of Super 2 highways led to statistically significant reductions in the incidence of crashes of 35% for crashes on segments only (KABC) and 42% for crashes on segments and at intersections (KABC) on the study corridors. These findings were consistent with those of previous studies of the safety of Super 2 corridors that showed improvements in safety with installation of passing lanes, even when traffic volumes were higher than those considered under previous guidance in Texas. INTERSECTIONS IMPROVEMENTS • Near term (1 to 2 years?) • Improvements can be incremental • Simple merge lanes • Simple de-acceleration lanes • Reduce access points • Frontage roads ELK CREEK INTERSECTION (longer term) MACK’S INTERSECTION ASHTON HILL SAFETY • South bound (down hill) congestion • Slow moving trucks • Add a mid-hill passing lane (west side)? • Must merge right at end of lane • Trucks stay right • Ashton Hills Estates access WILDLIFE • Idaho Legislature memorial opposing overpasses, underpasses, and fencing on US 20 in Fremont County – HJM 6 2019 • Advisory vote: 4 out 5 voters oppose overpasses, underpasses, and fencing on US 20 in Fremont County – November 2018 • 4-lanes is not an option for wildlife PATH FORWARD • REFINE THE COMMUNITY SOLUTIONS • SUB-COMMITTEE TO REFINE THE SOLUTIONS? • PREPARE A COMMUNITY PROPOSAL? • SEND TO? • PRESENT TO? • RESOLUTIONS: COUNTY AND CITY? • LEGISLATIVE MEMORIAL? CONTACTS
0 Comments
Leave a Reply. |
Making Sense of It All
This blog will help you make sense out of all the information on the website, how it affects IP, our history, and how efforts continue to put IP into various forms of conservation status. Archives
May 2023
Categories |