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DETECTABILITY OF PAVEMENT MARKINGS UNDER STATIONARY AND DYNAMIC CONDITIONS AS A FUNCTION OF RETROREFLECTIVE BRIGHTNESS.
| 题名： | DETECTABILITY OF PAVEMENT MARKINGS UNDER STATIONARY AND DYNAMIC CONDITIONS AS A FUNCTION OF RETROREFLECTIVE BRIGHTNESS. |
| 作者： | Jacobs-GF; Hedblom-TP; Bradshaw-TI; Hodson-NA; Austin-RL |
| 关键词： | TRAFFIC-MARKINGS; RETROREFLECTIVITY-; BRIGHTNESS-; DETECTION-; VISIBILITY-DISTANCE; TRAFFIC-MARKING-MATERIALS; STATIONARY-VEHICLES; MOVING-VEHICLES; RURAL-AREAS; NIGHT- |
| 摘要： | With the availability of pavement marking systems having varying reflective performance, the brightness a road surface marking must have to provide safe and effective guidance has remained undefined. This work studied minimum reflective brightness needed for a pavement marking to be visible to a driver as a function of distance of the marking from a vehicle. Six pavement marking products having a wide range of retroreflective brightness performance were viewed as isolated center skip lines from stationary vehicles at distances from 30 to 250 m in a dark rural setting. Product detectability for each viewer/marking combination was determined. Also, seven pavement marking products were viewed from moving vehicles with a driver approach speed of 24 kph. Detection distances for each driver/marking combination were determined. Retroreflective brightness of the products as a function of distance was measured at geometries corresponding to the vehicle-driver distances of the experiment. Detectability of pavement markings depends on the viewing conditions. A correlation could be seen between detectability of pavement markings and product brightness and viewing distance. The nature of this correlation was different when the experiment was changed from a stationary viewing to one with a moving vehicle with shorter detectability distances for the same marking in a moving vehicle. |
| 总页数： | Transportation Research Record. 1995. (1495) pp68-76 (10 Fig., 4 Tab., 8 Ref.) |
| 报告类型： | 科技报告 |
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