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TH 3715topping Sight Distance <br /> Stopping Sight Distance (SSD) is used for vehicles on TH 371 approaching the intersection with CSAH <br /> 29/Wilderness Rd. SSD is the distance traveled by a vehicle in the time it takes for a driver to perceive a conflict <br /> and for that vehicle to come to a stop under breaking. <br /> Figure 5 shows the required stopping sight distance for a 65mph roadway(TH 371). <br /> L'.S.Customar� <br /> Perception Sto m si , t distance <br /> Iksien Braking PP � � <br /> �'reactian <br /> �� disiance distance Calculated I3esign <br /> (mFb) �g) f ft� (�) (ft) <br /> 3d 110.3 86.4 196.7 2d0 <br /> 3� 128.6 117.6 ?46.'_' 2�0 <br /> �0 1�7.0 153_6 300.6 365 <br /> 45 164.� 194.6 359.8 3G0 <br /> 50 183.8 240.0 4�3.8 425 <br /> 55 ?02.1 ?90.3 h92.4 495 <br /> 60 ?20.� 3455 �66.0 <br /> 65 ?38.9 �5.� 644.4 6t15 <br /> 7d 257.3 �70.3 7?7.6 <br /> 73 275_f► 539.9 515.� 8?4 <br /> Figure 5:Stopping Sight Distance on Level Terrain2 <br /> CSAH 29/Wilderness Rd. Decision Sight Distance <br /> MnDOT's Road Design Manual contains Cases3 regarding necessary sight distances a vehicle on the minor <br /> approach requires to make the decision to enter the intersection and perform a movement. Case IIIA refers to a <br /> vehicle crossing TH 371 from a stop,Case IIIB refers to a vehicle that is making a left turn from CSAH <br /> 29/Wilderness Rd onto TH 371 from a stop. Figure 6 shows the intersection of TH 371 at CSAH 29/Wilderness Rd <br /> with the widths of TH 371 used in the sight distance calculations. <br /> TH 371 at CSAH 29 Intersection Evaluation 8 <br />