A work machine including: a machine base for supporting the work machine on a ground surface; a speed range control operable by a user to select a respective one of a low ground speed range and a high ground speed range; a drive system controllable by the user to drive the work machine in a direction of movement over the ground surface at a maximum ground speed within the selected ground speed range; a primary steering control and a secondary steering control, each of the primary and secondary steering controls being selectively and independently operable by the user to control the direction of movement of the work machine over the ground surface; a tool actuation system operable by the user in a work mode of the work machine to manipulate a tool mounted on the tool actuation system with at least one degree of freedom relative to the machine base; and a travel mode control (50, 50') operable by the user to configure the work machine selectively for operation in the work mode and in a travel mode, wherein in the travel mode the tool actuation system is disabled to prevent movement of said tool in said at least one degree of freedom relative to the machine base; and wherein in the travel mode the secondary steering control is disabled so that only the primary steering control is operable by the user to control the direction of movement of the work machine over the ground surface, and wherein the speed range control is operable and the drive system is controllable by the user to drive the work machine at a maximum ground speed within either selected one of the low ground speed range and the high ground speed range in both the travel mode and the work mode. a machine base for supporting the work machine on a ground surface; a speed range control operable by a user to select a respective one of a low ground speed range and a high ground speed range; a drive system controllable by the user to drive the work machine in a direction of movement over the ground surface at a maximum ground speed within the selected ground speed range; a primary steering control and a secondary steering control, each of the primary and secondary steering controls being selectively and independently operable by the user to control the direction of movement of the work machine over the ground surface; a tool actuation system operable by the user in a work mode of the work machine to manipulate a tool mounted on the tool actuation system with at least one degree of freedom relative to the machine base; and a travel mode control (50, 50') operable by the user to configure the work machine selectively for operation in the work mode and in a travel mode, wherein in the travel mode the tool actuation system is disabled to prevent movement of said tool in said at least one degree of freedom relative to the machine base; and wherein in the travel mode the secondary steering control is disabled so that only the primary steering control is operable by the user to control the direction of movement of the work machine over the ground surface, and wherein the speed range control is operable and the drive system is controllable by the user to drive the work machine at a maximum ground speed within either selected one of the low ground speed range and the high ground speed range in both the travel mode and the work mode.