Butterworth–Kulim Expressway, BKE (Malay: Lebuhraya Butterworth-Kulim), Asian Highway Route AH140 is an expressway in Malaysia. The 17 km (11 mi) expressway connects Butterworth, Penang in the west to Kulim, Kedah in the east. It is also a main route to East-West Highway (Federal route ) via Baling, Kedah and Gerik, Perak. The Kilometre Zero of the expressway starts at Sungai Nyior junctions in Butterworth, Penang. The construction of BKE started in December 1994 and completed in September 1996.
Konsortium Lebuhraya Butterworth-Kulim (KLBK) Sdn Bhd, commercially known as Buterworth Kulim Expressway (BKE) a wholly owned subsidiary of PLUS Expressway Berhad ("PLUS Expressways") has been awarded the concession and contract to construct and operate the highway of dual two (2) lane carriageway with separate motorcycle tracks and related highway facilities for the 16.78 km highway. The concession period is for thirty-two (32) years (June 1994 to June 2026, including 2 years construction period), after which the highway will be transferred to the Government.