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Memorandum <br />IVOIa'TH O1M5TED ENGIIVEERIfiIG <br />February 28, 2000 <br />TO: Ronald J. Tallon, Sr. <br />Planning Commission Chairman <br />SUBJECT: Ordinanee 2000-12 <br /> ?..„.? a ;N ? Y ? - 1 <br /> <br />? a <br /> <br /> <br /> <br /> <br />For a traffic safety standpoint, there are generally three points to consider with signs. <br />These points (as noted in Section 1163.17 of Ordinance 2000-12) revolve around not <br />obstructing driver vision of approaching vehicles or pedestrians, not obstructing or <br />creating confusion with traffic control devices and having a sign that can be read or <br />identified quickly by a driver. <br />OBS'TRiTCTION OF VISIOIV - VEHICLES ANl) PEDESTRIANS <br />The Ohio Department of Transportation's (ODOT) "Loccction And Design Manual, <br />Volzcfne 1, Roachvccy Design" devotes a number of pages to sight distance. The two <br />types of sight distance we would be interested in are Stopping Sight Distance (SSD) <br />and Intersection Sight Distance (ISD). Stopping Sight Distance is the distance a motorist <br />should be able to see ahead so that he will be able to stop from a given design speed, <br />short of an obstruction or foreign object. Intersection Sight Distance is the distance a <br />motorist should be able to see other traffic operating on the intersected highway so that <br />he can enter or cross the highway safely. <br />In order for drivers on the main street to observe a sign as soon as possible, plaeing the <br />sign as close to the street right-of-way as possible without obstructing vision is ?enerally <br />the goa1. Section 1163.26(b)(2) says in part that a ground sign can not be placed "within <br />a triangle formed between points formed on the street right-of-way and the nearest edge <br />of an intersection drive within thirty-five (35) feet from their intersection". <br />The attached drawing was originally developed by the Building Department to check a <br />specific location for sign placement. I am going to expand on this drawing to show a <br />worst case scenario. <br />In a public street to a public street intersection, ODOT uses a driver set-back from the <br />intersecting street curb line to the driver of seventeen (17) feet. In a driveway to public <br />street intersection this distance is generally less, since drivers pull-up as close to the <br />intersecting street curb line as possible. The 17 feet indicated in the attached drawing <br />would then be the worse case.