
Changes from the earlier version of RP-22-11 include the latest research, international standards, experience, and equipment technology, including revision of the transition curve, wall illumination measurement methods, a new calculation and field measurement grid, and a new annex on calculating Tunnel Wall Luminance.
RP-22-11 provides information to assist engineers and designers in determining lighting needs, recommend solutions, and evaluate resulting visibility at vehicular tunnel approaches and interiors. Administrators responsible for providing a safe environment within a tunnel both day and night can also benefit from the document.
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