K-18 & Miller/Davis Drive Intersection Improvements

Schwab Eaton completed design and construction services for the intersection of K-18 highway and Miller Parkway/Davis Drive in western Manhattan, Kansas. Through-traffic on K-18 increased such that traffic signal warrants were met. Minor street drivers experienced significant delay and a reduction in safety during peak hours. The City of Manhattan selected Schwab Eaton to determine the proposed improvements, complete the proposed design, and provide construction observation and support services. Schwab Eaton held public information meetings, solicited community input, performed a detailed traffic study, and presented the project before the City Commission in order to determine the scope of improvements. A traffic signal was chosen over no-build and roundabout concepts. Improvements included installation of a traffic signal and lighting equipment, pavement markings, traffic signage, and seeding. Turn lanes were evaluated and extended to accommodate the design traffic queues. Due to the high speeds on K-18, advanced video detection was used to eliminate dilemma zone impacts for K-18 motorists. Advanced warning signs with flashing beacons were coordinated to flash only when K-18 drivers must stop. This innovative strategy was used to provide advanced warning to motorists approaching the intersection located on both horizontal and vertical curves.