Invitation to bid, deadline 24.01.2011, for tunnel intrusion detection system for Oakland, Wye and Berkeley Hills tunnels of San Francisco BART. Contract No 79HS-110, value USD1.5-2.0 million (EUR1.11-1.47 million), duration 180 days. Bidders may download request form at www.bart.gov/about/business/procurement/contractsout.aspx to be completed and submitted by 29.11.2011. Sealed bids to District Secretary's Office, 23rd Floor, 300 Lakeside Drive, Oakland, CA 94604-2688. Visit www.bart.gov. 47/11.