Sultanah Bahiyah Highway

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Federal Route 255
Sultanah Bahiyah Highway
Route information
Length	13.84 km (8.60 mi)
Major junctions
Northeast end	Alor Setar (North) Interchange
Major intersections	K8 Jalan Langgar FT 1 Darul Aman Highway FT 7 Federal Route 7 FT 78 Kuala Kedah Highway FT 1 Sultan Abdul Halim Highway FT 1 Federal Route 1 North–South Expressway Northern Route AH2 North–South Expressway Northern Route
Southeast end	Alor Star (South) Interchange
Location
Country	Malaysia
Primary destinations	Bukit Kayu Hitam Kangar Kuala Kedah Penang Ipoh Kuala Lumpur
Highway system
Highways in Malaysia Expressways Federal State

The Sultanah Bahiyah Highway^[1] (Malay: Lebuhraya Sultanah Bahiyah), Federal Route 255 (formerly Alor Setar Bypass and Jalan Sultanah, both Kedah State Route K139) is a major highway bypass in Alor Star, Kedah, Malaysia.^[2] It was named after the late Sultanah Bahiyah, a first consort of Sultan Abdul Halim of Kedah. The Kilometre Zero is located at Alor Setar North.