The Bukit Timah Expressway AH 2 (abbreviation: BKE; simplified Chinese: 武吉知马高速公路; pinyin: Wǔjízhīmǎ Gāosù Gōnglù; Tamil: புக்கிட் தீமா விரைவுச்சாலை); Malay: Lebuhraya Bukit Timah) is a highway in Singapore that starts at the PIE in Bukit Timah and travels north to the Woodlands Checkpoint and the Johor–Singapore Causeway.

Before the KJE was completed, BKE was the shortest expressway in Singapore, at about 10 km (6.21 mi). This expressway is a six-lane dual carriageway, with three lanes on either side. In 2003, the LTA began work to convert a section of the expressway, from the intersection with the KJE to that with the SLE, into a four-lane dual carriageway. This was completed in mid-2005.

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