for steering front wheels 18 f and a service brake system 32 including a brake pedal 34 that when depressed brakes all wheels 18 f 18 r ecs 20 comprises one or more processors that process various data for calculating control data for various devices in the truck ecs 20 repeatedly processes data relevant to determining the extent to which dpf 24 is loaded with dpm when the result of such processing discloses that dpf 24 requires regeneration ecs 20 provides an appropriate signal if a regeneration initiation algorithm in ecs 20 provides for automatically forced regeneration in consequence of such a signal provided that favorable regeneration conditions such as highway cruising are present then regeneration proceeds under control of ecs 20 without driver initiation if truck 10 were parked with engine 12 running when ecs issued a signal disclosing a need for dpf regeneration then the inventive strategy would be utilized that strategy will now be explained with reference to fig2 where the general reference numeral 40 refers to the inventive strategy strategy 40 is performed by suitable algorithms implemented in ecs 20 to process data from various sources for accomplishing the steps shown in fig2 the reader should therefore appreciate that fig2 does not include detail of actual processing programs in ecs 20 while recognizing that such processing programs can be developed by conventional programming techniques based on the level of detail presented in fig2 as further detailed by the written text presented here with engine 12 running normally reference numeral 42 a processing step 44 monitors data to ascertain if dpf 24 requires regeneration as long as no need for regeneration is disclosed reference numeral 46 step.