•A door-to-door travel time accessibility evaluation approach.•New city-pair-specific catchment area delineation method that factors in modal competition.•Evaluate the proposed Dallas-Houston HSR project using the proposed door-to-door approach.•Apply an RGB mixing… Click to show full abstract
•A door-to-door travel time accessibility evaluation approach.•New city-pair-specific catchment area delineation method that factors in modal competition.•Evaluate the proposed Dallas-Houston HSR project using the proposed door-to-door approach.•Apply an RGB mixing scheme to visualize detailed spatial patterns of catchment areas in the Dallas-Houston HSR corridor.
               
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