For discussion
on 26 May 1999


Transport - Roads

464TH-Lung Cheung Road and Ching Cheung Road improvements
    Members are invited to recommend to Finance Committee an increase in the approved project estimate of 464TH from $1,062.0 million by $66.0 million to $1,128.0 million in money-of-the-day prices.


The approved project estimate of 464TH is insufficient for the works under the project.


2. The Director of Highways (DHy), with the support of the Secretary for Transport, proposes to increase the approved project estimate of 464TH from $1,062.0 million by $66.0 million to $1,128.0 million in money-of-the-day (MOD) prices.


3. The scope of the project comprises -

  1. the widening of Ching Cheung Road and the section of Lung Cheung Road between Ching Cheung Road and Lion Rock Tunnel Road from dual two-lane to dual three-lane;

  2. the construction of an off-line link between Tai Po Road and Lung Cheung Road with new interchanges at Nam Cheong Street and Tai Po Road;

  3. the realignment of the ramps at the Butterfly Valley interchange;

  4. associated drainage, street lighting, landscaping and slope works and other ancillary works; and

  5. the installation of noise barriers along sections of the proposed off-line link and sections of Lung Cheung Road and Ching Cheung Road that are to be widened.


4. Following a review of the financial position of the project, DHy considers it necessary to increase the approved project estimate of 464TH from $1,062.0 million, by $66.0 million, to $1,128.0 million in MOD prices (see paragraph 6 below) in order to complete the works.

5. There are four main reasons for the increase. The first reason is the increase in payments under the contracts due to price variations1 , as the original approved project estimate was at September 1993 prices, not in MOD prices. The second reason was that we need to undertake additional stabilisation works on steep natural roadside slopes which unexpectedly have poor geotechnical conditions that could only be identified after removal of the vegetation cover on site. We also needed to carry out remedial works on a Tai Po Road slope constructed under the project. The slope failed on 9 June 1998 due to the tremendous surface run-off from outside the site during an exceptionally severe rainstorm2 . Thirdly, upon remeasurement, the quantities of works were found greater than the original estimated quantities. The additions were mainly related to increase in pile lengths, quantities of excavation of unsuitable material, and minor modifications to bridge works. Lastly, we also incurred additional costs in the form of prolongation costs and increase in preliminaries as a result of the extended contract period with corresponding increases in consultants' fees and site staff costs.


6. A summary of the proposed increase in the project estimate is as follows -

$ million
(a) Price variations(14.5)
    (i) lower tender prices 3
    (ii) price fluctuation payments under the contract for works mentioned in paragraph 5 above
(b) Specification changes88.6134.2
    (i) additional slope stabilisation and remedial works
(ii) re-measured quantities of works60.9
(c) Prolongation costs and increase in preliminaries32.348.9
(d) Others(45.3)(68.6)
    (i) resident site staff cost
    (ii) consultants' fees (construction stage)
    (iii) contingencies
Sub-total66.0100.0(at December
1998 prices)
(e) Provision for price fluctuation0.0
at MOD prices

7. A comparison of the cost breakdowns of the approved project estimate (at September 1993 prices) and the revised project estimate (at December 1998 prices) is at the Enclosure.

8. Subject to approval, we will phase the expenditure as follows -/Up …..

Year$ million
(Dec 1998)
$ million
Up to 31 March 19995 1,054.7-1,054.7
1999 - 200039.81.039.8
2000 - 200133.51.033.5

9. The proposed increase in the approved project estimate will not give rise to additional annually recurrent expenditure.


10. As there is no change in the approved project scope, we consider that it is not necessary to carry out any further public consultation.


11. We have substantially completed the works. The proposed increase in the approved project estimate does not have any environmental implications.


12. The proposed increase in the approved project estimate does not have any implications in respect of land acquisition./BACKGROUND …..


13. Lung Cheung Road and Ching Cheung Road form part of Route 4 linking east and west Kowloon. The Second Comprehensive Transport Study recommended to upgrade the roads from dual two-lane to dual three-lane to meet traffic demand in the late 1990s. On 25 February 1994, we upgraded 464TH to Category A entitled "Lung Cheung Road and Ching Cheung Road improvements'.

14. The original programme for the project was to complete construction works in July 1997. We substantially completed the construction in August 1998. The delay of thirteen months was mainly due to the following reasons -

(a) re-measured works and modifications to bridge works;3
(b) additional stabilisation works on roadside slopes; and4
(c) entrusted remedial works6 on an existing slope at Ching Cheung Road which failed on 3 August 1997 during a rainstorm.6


Transport Bureau
May 1999

Enclosure to PWSC(1999-2000)16

464TH - Lung Cheung Road and Ching Cheung Road improvements

A comparison of the approved project estimate at September 1993 prices and the revised project estimate at December 1998 prices is as follows -

(Sept 1993)
$ million
(Dec 1998)
$ million
$ million
(a) structural works445.7 472.827.1
(b) ground level roads and slope works391.0426.935.9
(c) landscaping10.010.30.3
(d) street lighting7.08.51.5
(e) reprovisioning and diversion of water mains42.025.9(16.1)
(f) noise barriers11.541.830.3
(g) resident site staff cost46.865.218.4
(h) consultants' fees for construction stage11.012.21.2
(i) prolongation cost and increase in preliminaries-32.332.3
(j) contingencies97.032.1(64.9)
Total 1,062.01,128.066.0
2. For better illustration, the table below explains the proposed increase in project estimate mentioned in paragraphs 1 (a) to (f) -

Increase in cost
(from Sept 1993 to Dec 1998)
Difference in
from Sept
1993 to
Dec 1998
(a) structural works(65.6)49.343.427.1
(b) ground level roads and slope works(58.0)46.127.720.135.9
(c) landscaping(1.5)
(d) street lighting2.90.8(2.2)1.5
(e) reprovisioning and diversion of water mains(18.3)2.4(0.2)(16.1)
(f) noise barriers27.24.0(0.9)30.3

3. As a reference, the Highways Construction Cost Index increased by about 39% from September 1993 to December 1998.4. As regards (g) (resident site staff cost), the increase of $18.4 million is due to the salary revisions of the resident site staff in line with the increases of civil service salaries between September 1993 and December 1998 ($14.6 million) and the additional site staff cost due to the belated completion of the project ($3.8 million).5. As regards (h) (consultants' fees for construction stage), the increase of $1.2 million is due to price fluctuation over the years. 6. As regards (i) (prolongation costs and increase in preliminaries), the additional cost of $32.3 million is due to payments to cover the contractor's head and site office expenditure during the extended contract period.

7. As regards (j) (contingencies), the retention of $32.1 million in the project contingencies is to allow for possible claims 7 from the contractor.(PWSC0142/WIN5)

1.In accordance with the provision of the contract, we are required to adjust the sum payable to the contractor to reflect changes in the 'Index Numbers of the Costs of Labour and Selected Materials used in Government Contracts'. This is a standard practice set out in Works Bureau Technical Circular No. 14/95.

2.The slope in question was completed in April 1998 and the failure occurred during the hoisting of black rainstorm warning signal on 9 June 1998 prior to the handing over of the slope to the maintenance authority. We have carried out a detailed investigation which indicated that the failure was due to the exceptionally heavy rainstorm.

3.The average of all tenders received, excluding those non-competitive ones, is 6% higher than our original estimates. The accepted tender, which is also the lowest of all tenders, is 11% less than our original estimates.]

4.As we have substantially completed the works, the project is not subject to further adjustments for price fluctuation.]

5.This is the actual expenditure incurred.]

6.As the concerned slope is adjacent to the project site of 464TH, the Director of Civil Engineering entrusted the slope remedial works to this project for construction, and charged its estimated cost of $42 million to Head 705 Subhead 5001BX "Landslip preventive measures".

7.Possible claims are related to valuation of slope works, foundation works and landscaping works.