Highway Slope Manual

16
year (Evans et al, 1998), they have not been of great consequence to highways, as so far
they have mainly occurred in relatively remote areas. However, new development, redevelopment
and highway projects have continued to extend into areas close to steep
natural terrain, thereby increasing the landslide risk. There have in fact been ‘near miss’
cases involving landslides on natural terrain (Evans et al, 1998; Franks, 1998; King, 1997).
On 4 and 5 November 1993, Lantau Island was subjected to a severe rainstorm, resulting in
over 800 natural terrain landslides there, some of which affected roads (Wong et al, 1997a;
Wong et al, 1998b). Plates 1.5 to 1.7 show some of the natural terrain landslides in recent
years. Plate 1.8 shows a highway located close to steep natural terrain.
Table 1.1 Highway Slope Incidents in Recent Years Involving Fatalities and Injuries
GEO Incident
Estimated Volume
Year No. and
Location
of Landslide Debris Fatality Injury
Reference
(m 3 )
92 HK92/5/38 Slope beneath Wah Yan College, 500 1 0
(Chan et al, 1996) Kennedy Road.
93 MW93/6/14 A bus shelter at Cheung Shan Estate. 50 1 4
(Chan et al, 1996)
94 MW94/8/3 Castle Peak Road, Tsing Lung Tau 300 1 0
(Chan et al, 1996) near Lightpost FA1221-7G.
95 HK95/8/43 No. 30 Fei Tsui Road (Baptist 14 000 1 0
(GEO, 1996a) Church), Chai Wan.
95 HK95/8/49 Shum Wan Road, Aberdeen. 26 000 2 5
(GEO, 1996b)
95 MW95/8/21 Road widening project site near Siu 6 1 1
(Wong, 1997) Lam, Tuen Mun Highway.
97 MW97/7/10 Lido Beach, Castle Peak Road, Ting 750 0 6
(Halcrow, 1999a) Kau.
Note: Cases involving only very minor injuries (e.g. persons suffering simply from shock or persons discharged
soon after receiving minor treatments at a hospital) have not been included in this Table.
Plate 1.1 Landslide at Kennedy Road in May 1992 (Chan et al, 1996)
Note: A car travelling along Kennedy Road was hit by the landslide debris and the
driver was killed.