Time-saving bias
Time-saving bias is a concept that describes people's tendency to misestimate the time that could be saved (or lost) when increasing (or decreasing) speed.In general, people underestimate the time that could be saved when increasing from a relatively low speed - e.g., 25 mph (40 km/h) or 40 mph (64 km/h) - and overestimate the time that could be saved when increasing from a relatively high speed - e.g., 55 mph (89 km/h) or 90 mph (140 km/h). People also underestimate the time that could be lost when decreasing from a low speed and overestimate the time that could be lost when decreasing from a high speed.