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7� j is <br /> v Guidepost <br /> <<,,NO <br /> Speeding <br /> To reduce speeding along collector and local roadways, the ° "'. --q ;: ,,, . <br /> primary recommendation is the installation of raised pedestrian 'k -'t <br /> crossings at intersections. These treatments function similarly } <br /> to speed humps or cushions but serve the dual purpose of <br /> slowingtraffic and providinga designated, visiblepedestrian � . "`� ,- <br /> 9 <;. A <br /> crossing. The study conducted in Honolulu found that after ."' • <br /> � 4 <br /> installing raised crossings,the percentage of vehicles traveling =a > f <br /> more than 10 MPH over the speed limit at intersections dropped : `' <br /> from 27% to 9%. Raised crossings and speed cushions are not -�_ <br /> ideal in all settings as shown by the study performed in - <br /> Cincinnati raised crossing, and other raised speed control 44AgiiMailiCeititaiter ' <br /> devices need to be carefully evaluated on location if they are Marked Chicane in New York City <br /> placed on an arterial roadway. In these arterial roadway areas <br /> and areas with longer roadway segments that lack closely spaced intersections, such as some portions of the High <br /> Injury Network (HIN) and areas flagged in public comments, raised crossings would be ineffective. In these cases, <br /> alternative traffic calming measures such as chicanes or road narrowing are recommended to reduce vehicle speeds <br /> and enhance safety. Chicanes are a series of alternating curves or lane shifts designed to slow down traffic by forcing <br /> drivers to navigate a winding path. Lane narrowing has been shown to decrease speeds and has other benefits such <br /> as allowing for shorter crossing distances and allowing more room for pedestrian accommodations. A study of <br /> comparable streets (see Appendix M) shows that installing a combination of chicanes and lane narrowing reduced <br /> the speed of the roadway by between 3 and 5 MPH and <br /> i -",--I -: .' -'•::.'N <br /> reduced the average crashes per year from 11 down to <br /> 6. Installing roundabouts is another option that will <br /> • a ' <br /> `� = reduce speeds. Smaller diameter, "mini-roundabouts" <br /> t ,` - - can be installed at intersections on collector and local <br /> r;,---:::CF:::-:747:4•" " ' roads often replacing two-way stop or all-way stop <br /> - ' —Ailcontrol. Larger roundabouts at higher volume, high <br /> _� f crash intersections such as E Mound Road and N Martin <br /> it , Luther King Jr Drive can help reduce speeds and severe <br /> crashes especially when placed in a series. This has <br /> Roundabouts in Succession in Saukville,Wisconsin been shown to achieve a 10 MPH speed reduction when <br /> multiple roundabouts were placed in a series (see <br /> Appendix M). Additionally, roundabouts have been shown to lower the severity of crashes by reducing the number of <br /> conflict points at an intersection by 75% at a typical four-leg intersection. <br /> Education campaigns should focus on younger drivers as they are a demographic that is the most likely to speed while <br /> still being impressionable. Heavier enforcement of speed limits has been shown to decrease speeding overtime.While <br /> continuous heavy police enforcement may be difficult to maintain, rotating enforcement to different locations for <br /> short periods can create the perception of consistent oversight,which can influence driver behavior.Automated speed <br /> enforcement, such as speed cameras, has also been shown to improve speed compliance in many cities. If this <br /> becomes legal in Macon County they should be considered. Even if not actively used to issue citations,the presence, <br /> or perceived presence,of a widespread camera network can contribute to reduced vehicle speeds. <br /> kaput", Page 40 of 81 <br /> qiii all in <br />