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388.1 T6C0MS 2005 Congestion Management System (CoMS) 2005 Rail, Transit, and Planning Division Report Data and Statistics Bureau Planning Systems Section November 2005 •••• MontanaStateLibrary 3 0864 1006 3100 4 CONTENTS Report Overview / - 2005 1 CoMS Information 1 ATO. 1 1 1 1 1 Interstate System 1 NO. 2 1 1 1 C 1 Rural NI-NHS NO. 3 J 1 1 1 o 1 Rural Primary System 1 4 no. 1 M 1 1 1 Secondary System 1 NO. 5 S J 1 1 State Highways 1 NO. 6 1 1 1 Report 1 Corridors 1 NO. 7 1 1 1 Functional Class / Special Facilities / 8 NO. 1 M Miscellaneous ~~.n,„,-„„„**. Montana Departmentof Transportation 1 1 AVERY- EXECUTIVE READY INDEX' DIVIDERS 3 Q Digitized by the Internet Archive 2013 in http://arcTT^^ ' Overview The Congestion Management System did not allow for an analysis using 2003 (CoMS) underwent significant changes since traffic data. For the purposes ofthis report, the 2003 Report. The past year has been spent 2001 and 2002 will be used for comparison bringing CoMS into compliancy with the purposes. The following table provides a Transportation Information System (TIS). quick reference ofthe State's overall CoMS was previously base route driven while congestion indices by system. The table & the TIS had integrated the Departmental route shows a comparison ofthe 2001, 2002 and Corridor naming conventions. This TIS 2004 CIs to the projected CIs in five-year compliancy conversion has enabled CoMS to increments. Due to staffing constraints traffic perform analyses by departmental route and information is only available on five State corridor rather than the previous base route Highways; therefore an individual analysis naming convention. This program conversion was run on each ofthese five routes but no was a large undertaking and involved a great statewide analysis was calculated. deal oftime and effort. For this reason time Statewide Systems' Congestion Indices 2001 2002 2004 2004 2009 2009 2014 2014 2019 2019 2024 2024 System Existing2 Existing Existing E+C3 Existing E+C Existing E+C Existing E+C Existing E+C Interstate 94 93 93 92 90 89 86 NI-NHS 75 74 75 76 73 74 71 72 69 70 66 68 Primary 80 79 79 79 78 78 76 76 75 75 73 73 Secondary 92 91 91 91 91 91 90 90 89 89 89 89 AllOn-Systems4 85 - 84 85 84 85 83 84 82 83 80 82 Traffic Year 2ExistingHighwayNetwork 3ExistingplusCommitted HighwayNetwork Includesonlyon-systemroutesthatareanalyzedbyCoMS. Shadedcellsindicatetherearenocapacityenhancingprojectsforthissystem. -DuetotheTIScompliancyconversionCoMScouldnotanalyzeatthestatewidelevel using2002trafficdata. The following table illustrates the percent to the projected traffic year (2024). No ofmiles, by system, in each ofthe level of committed or recommended improvements service ranges. The percentages are a are included. comparison ofthe current traffic year (2004) Percent of Miles by Level of Service System Interstate NI-NHS Primary Secondary 2004 2024 2004 2024 2004 2024 2004 2024 A 95.4 71.2 34.8 24.9 38.8 31.5 78.6 72.5 of B 4.5 23.0 33.6 28.1 38.3 34.0 17.4 19.3 C 0.1 3.4 20.9 23.3 17.3 17.6 3.2 4.6 Service D Level 0.0 2.5 7.8 11.2 3.3 9.7 0.6 2.8 E 0.0 0.0 2.9 9.9 2.2 6.5 0.1 0.7 F 0.0 0.0 0.0 2.7 0.0 0.7 0.0 0.1 CoMS Information CoMS Definition The Congestion Management System, or LOS B - The ability to maneuver within the CoMS as it is commonly called, is a database traffic stream is only slightly restricted, and the that utilizes several techniques (both automated general level ofphysical and psychological and manual) to produce congestion indices (CIs) comfort provided to drivers is still high. Minor for the majority ofMontana's "on-system" disruptions are still easily absorbed at this level. roads. The CoMS measures the current and, in the case ofthe rural corridors, the future LOS C - Freedom to maneuver within the (predicted) "operational health" ofthe highway traffic stream is noticeably restricted. There are systems. noticeable increases in platoon formation, On the rural highway corridors, CIs consist of platoon size, and frequency ofpassing point values ranging from - 100 and are a impediments. Minor disruptions may be numerical representation ofthe levels ofservice expected to cause serious local deterioration in (LOS). Numerical ranges were developed 1) to service, and queues may form behind any accommodate the input for CoMS equations and significant traffic disruption. 2) to identify any analysis segment/corridor's relative position within a LOS range. LOS D - Freedom to maneuver is more The following table represents the CI range for noticeably limited and the driver experiences each LOS. reduced physical and psychological comfort levels. Even minor incidents can be expected to create queuing because the traffic stream has LOS CI RANGE little space to absorb disruptions. A 85-100 B 70-84 LOS E - Roadway is operating at capacity. C 55-69 Operations at this level are volatile there being D 40-54 virtually no usable gaps in the traffic stream. E 25-39 F 0-24 LOS F - Describes breakdowns in vehicular flow. There are six levels ofservice defined for each Congestion Definition type offacility (i.e. two-lane, multi-lane, and The Department, as part ofthe Performance freeway). These LOSs are given letter Programming Process (P3 has adopted designations, from A to F, with LOS A congestion based performa),nce objectives for representing the best operating conditions and each ofMontana's highway systems, excluding LOS F the worst. Each level ofservice local roads. A level ofservice deemed represents a range ofoperating conditions. The 'acceptable' was set for each system. For the definitions for these ranges vary based on the Interstate System, the level is a LOS greater type offacility being analyzed, but following are than C and for the remaining systems, NI-NHS, general definitions ofthe operating conditions Primary, Secondary and State Highways, the that exist at each level. acceptable LOS threshold has been set at greater than D. The "hot spot" maps in each system LOS A - Vehicles are completely section show the sections ofroads that do not unimpeded in their ability to maneuver within meet these acceptable thresholds. the traffic stream. Almost no platoons are observed.