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5-4(2) ROAD DESIGN NL'~NI,~AL (ENGLISh) JUNE. 2000 <br /> <br />5-4.01.04 L,~ft-Turn Bypaza Lanes <br /> [fa left~turn {ane {s not warranted, or it' the construction of a Ieft-tdrn lane is not practical (due to <br />terrain, ~tc.), [elavin~ no left-mm treatment as the only other alternative, designers should consider [eft4um bypass <br />tones. <br /> <br /> Thc bypass lane shown m figure 5-4.0lA is for use at ~'T" interjections. The combination right-turn and' <br />bypass tone shown in figure 5-4.0 lB is for use at four-legged intersections. Because of the hi~er volumes <br />associated with four-legged intersections, left-mm lanes are a more appropriate solution. Bypass lanes at four- <br />legged intersections should only be used after all other solutions have been found i.~..practicai and where the cross <br />street volume i-q low. <br /> <br /> Exclusive left mrn lanes are the mo~,'t effective and safe way to separate the left-mining from the through <br />traffic streams. Bypass tones are a convenience or an emergency measure, and are designed for lower speed <br />maneuvering. [fa left mm ts wan'anted a.n.d, practical, then it should be built Bypass lanes are a quick and <br />inexpensive way to make intersections (that would othe~vise have no left-turn treat, meat) more efficient for traffic" <br />operation. <br /> <br /> Designers should take into account that pavement markings for bypass lanes will infringe on the <br />availabili .fy of the passing zone. <br /> <br />5-4.01.05 CTWLTL <br /> A continuous Two-Way Left-Turn Lane on rural 2-1ane roadways may be considered on sections of <br />roadway with numerous entrances and a high accident rate. For design of CTWLTL and additional m/brmation, see <br />Se-anon 5-3.0l: <br /> <br />BY-PASS LANE at "T' IiNTERSECTION' <br /> Figure 5-4,01A <br /> <br /> <br />