Laserfiche WebLink
<br />1. Serves traffic pattern very well <br />11. Allows for single lane ramps <br />Ill. Can allow access to south west quadrant <br />b. Minus <br />i. East ramp intersection will require care in design of geometry and <br />signal phasing <br />11. Requires extensive right of way in northeast quadrant <br />Ill. Cost <br />10. Folded "B/A" with inverted loop has an added bridge and offers little added <br />capacity <br /> <br />Summary and conclusions <br /> <br />The following key traffic operations issues have been identified: <br /> <br />1. The westbound to southbound movement is best handled by a loop <br />2. The "choke point" for nearly all of the designs is the eastbound CSAH 14 exiting <br />leg where the heavy right turn from 1-35E joins with the other eastbound traffic. <br />The capacity of this exit point will control interchange operations. <br />3. The first local access point to the west with a full movement intersection must be <br />the north-south county road. <br />4. A south leg may be added to the west ramp intersection for several of the <br />alternatives <br /> <br />The following alternatives appear to be worth more detailed evaluation: <br /> <br />I <br />Alternative 2 - "Diamond with northwest loop" appears to offer sufficient capacity with a <br />lower cost and requires less right-of-way <br /> <br />Alternative 4 - Parclo "A" with loops in the southeast and northwest quadrants appears to <br />offer the best overall operation while utilizing simple traffic signals. It also uses existing <br />right-of-way. <br /> <br />Alternative 9 - Folded "B/A" which is similar to Mn/DOT's concept provides adequate <br />capacity, but takes up more space and is more expensive <br />