The complainant has requested information about the variable speed limit signage (VSL) displayed at a particular date, time and location. National Highways withheld the requested information, citing section 31 (Law enforcement) of FOIA. The Commissioner’s decision is that National Highways was entitled to rely on sections 31(1)(a), (b) and (c) to refuse the request and that the balance of the public interest favours maintaining the exemption.