Maricopa County Department of Transportation MAJOR STREETS and ROUTES PLAN Policy Document and Street Classification Atlas
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Maricopa County Department of Transportation MAJOR STREETS AND ROUTES PLAN Policy Document and Street Classification Atlas Adopted April 18, 2001 Revised September 2004 Revised June 2011 Preface to 2011 Revision This version of the Major Streets and Routes Plan (MSRP) revises the original plan and the 2004 revisions. Looking ahead to pending updates to the classification systems of towns and cities in Maricopa County, the original MSRP stipulated a periodic review and modification of the street functional classification portion of the plan. This revision incorporates the following changes: (1) as anticipated, many of the communities in the County have updated either their general or transportation plans in the time since the adoption of the first MSRP; (2) a new roadway classification, the Arizona Parkway, has been added to the Maricopa County street classification system and the expressway classification has been removed; and (3) a series of regional framework studies have been conducted by the Maricopa Association of Governments to establish comprehensive roadway networks in parts of the West Valley. Table of Contents 1. Introduction........................................................................................................................1 2. Functional Classification Categorization.............................................................................1 3. Geometric Design Standards..............................................................................................4 4. Street Classification Atlas..................................................................................................5 Roadway Cross-Section Schematics......................................................................................10 Map Index.............................................................................................................................13 Maricopa County Major Streets 1. INTRODUCTION systems are classified based on the trips served and Routes Plan and the operational characteristics of the streets The Board of Supervisors adopted the latest or highways. Distinctions are made between rural edition of the Transportation System Plan (TSP) and urban classifications, as discussed below and for Maricopa County on February 7, 2007. The illustrated in Figures 1 through 9 on pages 10 to TSP is the implementation component of the 12. For more detailed information please see the transportation element of the Maricopa County MCDOT Roadway Design Manual. Comprehensive Plan. Earlier editions of the TSP identified the need for a Maricopa County Major Level of Service and Roadway Streets and Routes Plan (MSRP). Classifications The MSRP is an important tool for planning future Definitions of the desired Level of Service (LOS) development along County roads. It insures designations for each roadway section referenced in adequate visibility and access, protects property the roadway function classifications is as follows: values and the neighborhood character, and enhances the unique qualities of County areas. A: Free flow, with low volumes and high speeds It also minimizes unnecessary costs and impact B: Reasonably free flow, speeds beginning to be to property owners and the public as designated restricted by traffic conditions roadways are improved. C: Stable flow zone, most drivers restricted in The Maricopa County Department of Transportation freedom to select their own speed (MCDOT) Roadway Design Manual is the controlling document for all roadway specifications and D: Approaching unstable flow, drivers have little requirements. Any references herein to the MCDOT freedom to maneuver Roadway Design Manual are to the edition adopted E: Unstable flow, may be short stoppages November 3, 1993 and revised April 2004. It is currently available online at: http://www.mcdot. F: Forced or breakdown flow maricopa.gov/manuals/eng_manuals/roadDesign/ Table 2.1: Urban and Rural Roadway Planning Level RoadwayCover_2004.pdf Traffic Volumes in Chapter 2 of the MCDOT Roadway Design Manual provides general ranges of traffic 2. FUNCTIONAL CLASSIFICATION volumes that can be expected for various roadway types. Please consult the latest edition of the CATEGORIZATION Roadway Design Manual for current traffic volumes. Also, please note that volumes shown in the above Functional classification is the process by which mentioned Table 2.1 are not used to determine roads are grouped into classes according to the roadway classifications in the MSRP. Roadway kind of service they provide. The basic functional classifications are determined primarily by definition classifications used in the MSRP are Arizona and supported by traffic analysis indicating the Parkway, Principal Arterial, Minor Arterial, Major desired LOS. Collector, and Minor Collector. Local Streets are included for reference only and are not part of the MSRP. Using national classification criteria, these MCDOT Major Streets and Routes Plan Page 1 2. Functional Classification Categorization Rural Principal Arterial • Development may front directly on the road A rural principal arterial road includes the following • Controlled intersection spacing of 2 miles or service characteristics: greater • Striped for one lane in each direction with a • Traffic movements with trip length and density continuous left turn lane suitable for substantial statewide travel • Desired LOS C • Traffic movements between urban areas with populations over 25,000 Rural Minor Collector • Traffic movements at high speeds A rural minor collector road includes the following • Divided four-lane roads service characteristics: • Desired LOS C • Traffic movements between local roads and Rural Minor Arterial collector roads • Traffic movements between smaller A rural minor arterial road includes the following communities and developed areas service characteristics: • Traffic movements between locally important • Traffic movements with trip length and density traffic generators within their remote regions suitable for integrated interstate or inter-county • Two-lane undivided roads with intersections service at grade, and designed to take a minimum • Traffic movements between urban areas or interference of traffic from driveways other traffic generators with populations less appropriate to a rural setting than 25,000 • Striped for one lane in each direction • Traffic movements at high speeds • Desired LOS B • Undivided four-lane roads • Striped for one or two lanes in each direction Rural Local Road with auxiliary lanes at intersections as required A rural local road includes the following service by traffic volumes characteristics: • Desired LOS C • Two-lane undivided roads with intersections at Rural Major Collector grade • Traffic movements between collectors and A rural major collector road includes the following adjacent lands service characteristics: • Traffic movements involving relatively short • Traffic movements with trip length and density distances suitable for inter-county service • Desired LOS A • Traffic movements between traffic generators, between traffic generators and larger cities, Urban Principal Arterial and between traffic generators and routes of a An urban principal arterial road includes the higher classification following service characteristics: • Traffic movements subject to a low level of side friction • Traffic movements in urban areas consisting MCDOT Major Streets and Routes Plan Page 2 2. Functional Classification Categorization of through movements and major circulation • Local areas include residential neighborhoods, movements in these areas commercial, and industrial areas • Traffic movements involving a large portion of • Traffic capacity for an urban major collector the total urban area travel on a minimum of road is limited not by the typical capacity of the mileage road section, but instead by the desirability of • Posted speeds less than or equal to 45 mph maintaining acceptable traffic levels by the use • Divided four-lane or six-lane roads of continuous center left turn lanes rather than • Striped for two or three lanes in each direction intermittent left-turn lanes with a median and exclusive turn lanes where • An urban minor collector road maintains applicable acceptable traffic levels that will not affect • Desired LOS D residential neighborhoods adversely • Urban “major” or “minor” classifications shall Urban Minor Arterial be made at MCDOT’s discretion • Desired LOS C (major collector) and LOS B An urban minor arterial road includes the following (minor collector) service characteristics: • Traffic movements in urban areas consisting Urban Local Road of major circulation movements within these An urban local road includes the following service areas, with more emphasis on land access than characteristics: major roads • Traffic movements do not penetrate residential • Two-lane undivided roads with intersections at neighborhoods grade with frequent driveway access • Traffic movements at moderate speeds with • Traffic movements between adjacent lands and partially controlled access facilities collectors or other roads of higher classification • Undivided four-lane with intersections at grade • Traffic movements over relatively short • Striped for two lanes in each direction with a distances, less than 8 blocks long in most cases center left turn lane • Desired LOS A • Desired LOS C Arizona Parkway Urban Major and Minor Collector An Arizona Parkway includes the following service Urban major and minor collector roads include the characteristics: following