Mark Thomas designed the Kirker Pass Road Northbound Truck Climbing Lane Project. Kirker Pass Road is a four-lane roadway and an important route between central and eastern Contra Costa County. It connects the City of Concord at the west end through the Meridian Hills to the City of Pittsburg on the east end. It is heavily used by truck traffic, commuters and recreational bicyclists. The project improves the safety of Kirker Pass Road with a 12-foot truck climbing lane in the northbound direction from Clearbrook Drive to the northern Hess Road intersection, and an eight-foot Class II bike lane. The project is located within hilly terrain which required construction of embankment and cut slopes, as well as a variety of retaining walls.