A mobile apparatus has a first articulating section comprising a leading traction control assembly including multiple points of contact inclined at a forward angle, and a second articulating section comprising an intermediate traction control assembly. A propulsion system is configured to coordinate movement of the leading traction control assembly and the intermediate traction control assembly. A connector operatively couples the first articulating section to the second articulating section, and the first articulating section is configured to articulate relative to the second articulating section in response to one or more of the multiple points of contact of the leading traction control assembly coming into contact with an obstacle. A bias assembly is configured to exert a continuous compression force against one or both of the first articulating section and the second articulating section to maximize the number of points of contact between the mobile apparatus and the obstacle.