KMB Route 91M

91M
A handful of Volvo Super Olympians (ASV) were scheduled to route 91M in mid-2000s, including ASV4 (JX9097)
Overview
Operator	Kowloon Motor Bus
Garage	Kowloon Bay (K)
Vehicle	Volvo Olympian 11m (AV) / Dennis Trident 3 10.6m (ATS)
Peak vehicle requirement	12
Route
Start	Diamond Hill Station
Via	Choi Hung Station Choi Wan Estate Tseng Lan Shue The Hong Kong University of Science and Technology Hang Hau
End	Po Lam
Competition	NT Green Minibus routes 11 and 11M
Service
Level	Daily
Frequency	About every 12-20 minutes
Operates	06:00 until 00:00 (from Diamond Hill) 05:40 until 23:45 (from Po Lam)
Fare	HK$6.1

Air-Conditioned New Territories Route No. 91M is a Hong Kong bus route operated by Kowloon Motor Bus, plying between Diamond Hill Station in New Kowloon and Po Lam in Tseung Kwan O, New Territories, via Clear Water Bay Road and The Hong Kong University of Science and Technology (HKUST).

To cater the demand of HKUST passengers, short-working trips by the number of 91P are provided on weekdays (except HKUST student holidays), during the morning peak from Diamond Hill to HKUST (North), and PM peak from HKUST (South) to Choi Hung Station.

Located at the eastern edge of the present-day Tseung Kwan O New Town, the district of Hang Hau was a collection of traditional villages with a market town facing Junk Bay before the 1970s. Transportation to and from Hang Hau then relied on kai-to ferries.

Route 91A, the first bus route serving Hang Hau Town, was introduced on April 1, 1976, serving between Hang Hau and Chuk Yuen (now known as Wong Tai Sin). After the city's Mass Transit Railway system commenced operation, the route was renamed 91M and truncated to Diamond Hill MTR Station with effect from December 16, 1979; it was further curtailed to Choi Hung MTR Station just 4 years later, on November 3, 1983. The Kowloon-side terminus of route 91M would return to Diamond Hill 14 years later, on November 2, 1997, this time to tie in with the opening of Diamond Hill Station Public Transport Interchange inside Plaza Hollywood shopping centre.