Honda's Walking Assist is finally getting a large-scale test run in the US. The company has started clinical trials of the leg-boosting device at the Rehabilitation Institute of Chicago, where it will (hopefully) help stroke victims regain their mobility. While Honda hasn't said how long the study will last, it could have a significant impact if it proves successful. Up to 80 percent of US stroke survivors have trouble walking quickly or smoothly, and Walking Assist's combination of hip sensors and motors could get some patients back to a normal stride.