《Turkishtenders》2004年12月17日报道，安卡拉－伊斯坦布尔二期铁路改造（Vezirhan-Inonu段）招标资格预选于2004年12月16日下午3点截标，该项工程100％利用外国贷款，业主为土耳其铁路总局。总计11家公司提交了标书，其中包括8家国际财团、2家合资公司和1家合伙公司，名单如下：
1. LIMAK INSAAT
IRCON INT. LTD. (India)
2. HOCHTIEF (Germany)
ENKA INSAAT AS
GAMA AS
3. NUROL INSAAT AS
RHOMBERG BAU (Germany)
TELVENT (Spain)
4. TEKFEN INSAAT AS
ELECNOR SA (Spain)
COBBA (Spain)
DIMETRONIC (Spain)
5. YUKSEL INSAAT AS
ZSCHOKKE LOCHER AG (Switzerland)
6. YAPI MERKEZI AS
MOWLEN
KISKA KOM.
OBAYASHI (Japan)
7. OBRANCON HUARTE LAIN SA(Spain)
ZS BRNO AS (Spain)
KOLIN INSAAT AS
8. ALARKO-ALSIM AS
SIEMENS AG (Germany)
9. CRCC (China)
CMC (INDIA)
CENGIZ INSAAT
ICTAS INSAAT
10. DOGUS INSAAT AS
UKRMETROTUNELBUD (Ukraine)
UKRTRANSELEKTROMONTAJ (Ukraine)
GULERMAK AS
YENIGUN INSAAT
11. ASTALDI SPA (Italy)
TEPE INSAAT AS
AKFEN INSAAT AS ANSALDO (Italy)