1. A steering mechanism to provide steering capability for both a host vehicle and for a milling attachment selectively separable from, but connectable to the host vehicle operated by an operator, the host vehicle providing propelling force to the milling attachment, the steering mechanism comprising:a support bar disposed forward of and connected to a milling attachment forward of a rotating cutting head the support bar further comprising a wheel pivotally mounted to the support bar via a pivot shaft;
a first steering actuator connected to the pivot shaft;
a second steering actuator connected to the pivot shaft;
a laser guidance system positioned on the milling attachment and directed to a tolerance target set to sense the vertical and horizontal position of the milling attachment relative to the tolerance target; and
milling attachment steering controls positionable for access and actuation by a steering operator observing the laser guidance system to steer the milling attachment and the host vehicle allowing the steering operator to maintain a horizontal and vertical compliance, independent of the host vehicle operator, the steering controls being connected to the first steering actuator and second steering actuator of the steering mechanism allowing a steering operator to control steering of both the host vehicle and the milling attachment by activating the first steering actuator and the second steering actuator of the milling attachment.