Laserfiche WebLink
• <br /> GEOMETRIC FEATURES FOR NEIGHBORHOOD TRAFFIC CONTROL <br /> 91 <br /> — Features which physically reduce speed, such as pavement undulations and <br /> raised intersections. <br /> — Features which attract the special attention of drivers,such as rumble strips. <br /> Their common characteristic is that by their physical form they force or prohibit a <br /> specific action.Geometric features have the advantages of being largely self-enforcing and <br /> of creating a visual impression,real or imagined,that a street is not intended for through <br /> traffic.The disadvantages relative to other devices are their cost,the potential negative im- <br /> pact on emergency and service vehicles,and the imposition of inconvenient access on some <br /> parts of a neighborhood.They also are static and must be appropriate at all hours of the <br /> day and night. <br /> Chokers,traffic circles,median barriers,diverters,channelization,and cul-de-sacs, <br /> as well as some less commonly used geometric features,are described in detail in this sec- <br /> tion.All such features are normally deployed in conjunction with traffic control devices <br /> such as signs,pavement markings,and reflectors,to warn motorists of their presence and <br /> indicate appropriate behavior. <br /> Chokers <br /> A choker or curb bulb is a narrowing of a street, either at an intersection (Fig. 5.3) or <br /> midblock,in order to reduce the width of the traveled way.While the term usually is ap- <br /> plied to a design which widens a sidewalk at the point of crossing,it also includes the use <br /> of islands which force traffic toward the curb while reducing the roadway width. <br /> -:"\'',. / .'' .1 ''.. '- __4.,,,-.-- --...--Li --_ <br /> 414414110 I <br /> S•� W <br /> I US <br /> � ..' *tap <br /> � Twsan e.m.a' �'ai O II <br /> _ <br /> ___--- -----111- - <br /> CINCH o cQQ'. Iegg ➢➢1)s► STREET <br /> tOp4 <br /> 1 �_� <br /> �� "'�_. <br /> 4 o c <br /> ig * SIMENIIIIMP <br /> ii <br /> p...., -- ;._-,-___- ______41p .____'-..,,_.-__:. __-____ , <br /> i :411 I IPPO4 I 1 It I F---4 1.1.`"---.'"-..-..-..---... --,-, t <br /> ; --;------.-H,/.A 0 t''''' .-.' ''''I' ''''''-'''''_ ----"A ri V' f I i <br /> , ,,.---....._.......4 i 0 i....,.,......__.................__...----....,_ - -j-- ____...----- 4 i . <br /> _ _ u., u, <br /> It) <br /> f _. . <br /> /mip... ..___ <br /> , ......„ <br /> I <br /> 'sem <br /> Figure 5.3 Choker. <br /> f <br /> I <br />