Invitation to prequalify, deadline 1st February, 2007 for construction works of five separate highway tunnels and their connection roads. The outlines of the five tenders are as follows:1) Sariyer-í‡ayirbasi highway tunnel-í‡ayirbasi crossing and connection roads-Kestanelik crossing and connection roads: 4,100 metres of tunnel construction2) Dolmabahí§e-Fulya Arasi highway tunnel-Dolmabahí§e crossing and connection roads-Fulya crossing and connection roads: 2,027 metres of tunnel construction3) Eyüp Silahtaraga Caddesi-Gaziosmanpasa Caddesi highway tunnel and flyover with crossing and connection roads: 200 metres of tunnel construction4) Fulya-Levazim highway tunnel: 4,450 metres of tunnel construction5) Levazim-Akatlar highway tunnel-Levazim crossing and connection roads-Akatlar crossing and connection roads: 3,360 metres of tunnel construction.Contact Istanbul Büyüksehir Belediyesi, Altyapi Hizmetleri Müdürlügü, M. Nezihi í–zman Mah. Kasim Sok. No. 62, 34010 Merter-Güngören, Istanbul. Tel. +90 2124494000, fax +90 2124494470. E-mail altyapi@ibb.gov.tr. Click here. 05/07.Within its investment programme, the Istanbul Metropolitan Municipality awarded last year the Dolmabahí§e-Dolapdere-Piyalepasa-Kagithane highway tunnel to a consortium of Kiska Komandit and Mak-Yol at a price of YTL105 million. This is a 2 x 3,800 m-long tunnel, built in NATM using hydraulic hammers. The carriageway width is 9.5 m and the diameter is 14 m. There are four attacks (one from each side in each tunnel) and 2,100 metres has already been built. Visit www.kiskagroup.com and www.mak-yol.com.tr 05/07.