详情

Effects of LED Rodway Lighting on Driver Sleep Health and Alertness

项目名称：	Effects of LED Rodway Lighting on Driver Sleep Health and Alertness
摘要：	Roadway lighting sources are being converted from high pressure sodium (HPS) and other high-intensity discharge (HID) luminaires to light emitting diode (LED) luminaires because LEDs are generally more energy efficient and may offer better visibility. LEDs with a correlated color temperature (CCT) greater than 3000K often have higher blue content in their spectrum (460 to 480 nm) than HPS lamps. Light in this wavelength affects the production of the hormone melatonin, which regulates the human circadian rhythm. In June 2016, the American Medical Association (AMA) issued a report (The Council on Science and Public Health Report 2-A-16, Human and Environmental Effects of Light Emitting Diode Community Lighting) noting that roadway lighting with higher blue content, such as the light produced by LEDs with higher CCTs, could adversely suppress melatonin and affect the sleep health of people exposed to it. However, a link between melatonin suppression and LED lighting at roadway levels has never been reported. There could, however, be an advantage to the blue content in the LEDs. Because the blue content in LEDs has the potential to suppress melatonin, then by extension it may have the potential to make drivers more alert. In order to design LED roadway lighting that minimizes any negative impacts on drivers, research is needed to understand the relationship between LED roadway lighting and driver sleep health and alertness. The objective of this research is to develop a guidance document for state DOTs that (1) describes the effects of LED roadway lighting on the sleep health and alertness of drivers, with attention to the illuminance, duration, and spectral power distribution (SPD) of the LED lighting; (2) compares these effects to those of (a) high-intensity discharge (HID) lighting and (b) the absence of roadway lighting; and (3) suggests methods to mitigate the effects, if any, of LED roadway lighting on sleep health and alertness. In this research, the term �sleep health� shall be construed to mean circadian disruption.
状态：	Active
资金：	399775
资助组织：	Federal Highway Administration
项目负责人：	Harrigan, Edward T
执行机构：	Virginia Polytechnic Institute and State University, Blacksburg
主要研究人员：	Bhagavathula, Rajaram
开始时间：	20180701
预计完成日期：	20200930
实际结束时间：	0