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Traffic Control Device - New Installation - (1) Stop Sign - Armstrong Dr. and Slater Dr_
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Traffic Control Device - New Installation - (1) Stop Sign - Armstrong Dr. and Slater Dr_
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4/26/2023 12:58:39 PM
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Board of Public Works
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Recommendations
Document Date
4/25/2023
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Page 2 of 4 <br />The IMUTCD advises that a STOP sign should be installed in a manner which requires the minimum number of <br />vehicles to stop, and hence should typically be installed on the minor street carrying the lower volume at an <br />intersection. If two streets with relatively equal volumes form an intersection, physical characteristics such as <br />topography and sight distance should be considered to decide which approach to bring under STOP control. <br />Sample Study Intersection Locations <br />The City of South Bend identified multiple intersections in four (4) neighborhoods for review of STOP sign <br />applicability that represented various existing conditions throughout the City. These intersections all lie within <br />residential communities, most of them providing access to single-family dwellings and some others acting as <br />collector streets within the residential communities. <br />Based upon the IMUTCD, it was determined that the volumes of the minor street do not have as much of an <br />impact on the determination to provide STOP control as the volume of the major street. Therefore, the <br />classifications of the major streets were deemed to be the determining factor of STOP sign applicability. Once <br />the classification of the major roadway was determined, the assumed crossing volumes were determined for <br />the minor approach. Analyzing the minor street traffic volumes allows for a comparison of the major and minor <br />street volumes and determines if STOP control may be justified from a volume standpoint. The Institute of <br />Transportation Engineers (ITE) Trip Generation Manual, 10th Edition, was utilized to estimate the number of <br />vehicles that would utilize any given approach on a typical weekday during the morning and afternoon peak <br />hours. The sample study T-intersections where STOP signs are not currently installed provide access to single- <br />family detached homes. As such, ITE Land Use Code 210 – Single-Family Detached Housing was utilized for trip <br />generation. <br />The recommendations provided in the following section are based on the characteristics of the roadway and its <br />surrounding area, the engineer’s understanding of general travel patterns of similar areas, and engineering <br />judgment. In most instances, the local street in the City is located in primarily residential areas, with low driving <br />speeds. The local street may or may not have an outlet connecting to other roadways. In some cases, as detailed <br />below, the characteristics of the major road connections at the next terminus away from the intersection with <br />the local road are the driving force in the determination of the applicability of STOP control. <br />A review of the sample intersections indicated that the major street fell into the following categories: <br />Major Collector connecting to Minor Arterial and Other Principal Arterial <br />This category pertains to intersections where one of the roadways forming the intersection is classified <br />as a collector, while the other is a local roadway, where the collector then connects to at least one major <br />roadway (Arterial). <br /> <br />Local Road connecting to Minor Arterial and Other Principal Arterial <br />This category considers an intersection of two local roadways; however, at least one of these in-turn <br />connect to roadways classified as an arterial (major or minor). In such instances, the major street at the <br />intersection typically carries significantly high through traffic volumes. <br /> <br />Local Road connecting to Major Collector <br />Similar to the previous scenario, this scenario considers the intersection of two local roadways, where <br />at least one further connects to a roadway classified as a collector. This applies to intersections in the <br />City where, although a roadway does not carry significant through traffic, it connects to a roadway with <br />much heavier traffic. <br /> <br /> <br />
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