Tolo Highway (Chinese: 吐露港公路; Cantonese Yale: tou3 lou6 gong2 gung1 lou6) is a major expressway on Route 9 in Hong Kong.

The following 7.3 kilometres (4.5 mi) of the road, running alongside the East Rail line, was built on an embankment on the west coast of Tolo Harbour towards Yuen Chau Tsai (Island House), which marks the eastern end of the Tai Po New Town.

Construction began in March 1999 to expand the section to a dual four-lane carriageway and was finished in August 2003.

The next section, 5 km (3.1 mi) long, bypasses Tai Po on the hills to its south, over Wun Yiu, Ma Wo and Pun Chun Yuen.

As the alignment crosses a number of remote ravines far away from existing roads, four bridges along the bypass had to be incrementally launched.