This report examines the electromagnetic radiation arising from microwave beacons and infra-red illuminators which were components of the systems tested during the technology trials on the TRL track. A general summary of the main human health effects of exposure to relevant non-ionising radiation is provided. The report also discusses UK, European and US radiation standards. (A) (This report is also included on the TRL CD-ROM entitled "Research on road user charging 1995-1998"). For the covering abstract see IRRD 491340.

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