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RetroTek: standards are key
| 题名： | RetroTek: standards are key |
| 正文语种： | eng |
| 摘要： | Accurate retroreflectivity measurements of line markings across the full lane width has become even more important after the US adoption of minimum levels of retroreflectivity. After a long period of consultation and assessment the Federal Highway Administration recently announced the standards for pavement markings on all roads open to public travel in the US. Key changes include a minimum retroreflectivity of longitudinal pavement markings to 50 mcd/m~2/lux on roads with speed limits of 55km/h or greater, where average annual daily traffic is 6,000 vehicles per day. The minimum retroreflectivity of longitudinal pavement markings is 100 mcd/ m~2/lux on roads with speed limits of around 110km/h or greater. However, the FHWA has decided that this standard does not apply to other pavement markings such as centre symbols, arrows, chevrons or words. Crosshatch markings, transverse markings and crosswalks are also excluded from the minimum standard. Nonetheless, the US division of Irish firm RetroTek (Reflective Measurement Systems) welcomes the FHWA's update to the Manual on Uniform Traffic Control Devices. These updates should play a key role in reducing transportation-related fatalities and serious injuries, according to the company. |
| 出版年： | 2022 |
| 期刊名称： | World highways |
| 卷： | 31 |
| 期： | Oct. |
| 页码： | 29-29 |
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