Night Time Sight Distances
The darker the pedestrian's clothing at night, the closer the driver will be before the driver perceives the pedestrian. The illumination of the object (pedestrian) at recognition has been between 1 and 3 Lux for light colored objects, between 3 and 11 Lux for grayish objects and 15 to 20 Lux for dark objects. 
The average recognition distance that drivers in moving vehicles were able to recognize objects along the roadside varied based upon a number of factors including ambient lighting, pedestrian movement, headlight type, pattern, object size, position left versus right (near versus off), and the shade of the object. The chart below shows the average recognition distances across all unlit on-road studies included when accounting for only position (left versus right) and clothing. These numbers represent the average recognition assuming the driver was not shown the object beforehand and that the driver responded when relatively sure of the target (recognition, not detection).
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Crash Safety Research Center (CSRC), LLC is known for its scientific research related to driver, rider and pedestrian response (human response to traffic). We have conducted research in our laboratory, in the field, on a driving simulator and in the form of case study research in an effort to learn more about how drivers’ responses change in various circumstances. 
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