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(' Hong Kong Government l' Highways Department Cl lmi&tI C' o C' o Route 5 (I Section Between () o Shek Wai Kok and Chai Wan Kok (1 1i~~. -:filltlJ~~.tlJPl C C Cl o o Environmental Impact Assessment o Executive Summary o l C G L l C Mott MacDonald Hong Kong Ltd. L in association with L EBC Hassell Limited ( L February 1995 (
( c c Final Assessment Report Doe. Ref , : T3S0/0S c Executive Sum,mary Rev. No. :E c c EXECUTIVE SUMMARY c Introduction c Route 5 comprises the section of the New Territories Circular Road between Shatin and Tsuen Wan. The connection from Shatin to Shek Wai Kok was completed and opened to traffic in April 1990 with c the opening of the Route 5 tunnels project and the Territory Development Department now proposes to construct the section from Shek Wai Kok to Chai Wan Kok. Highways Department have been c appointed as works agency for the project. This section of the road is urgently needed to reduce congestion and the environmental effect of heavy traftic through the central areas of Tsuen Wan. and o has been included on the Outline Zoning Plan and Outline Development Plan for several years. c Traffic between Tuen Mun Road/Castle Peak Road (Sham Tseng) and Route 5 currently passes through the congested road network within Tsuen Wan. During peak hours, the four signalized o junctions, viz., ,Castle Peak Road/Tsuen King Circuit, Castle Peak RoadlTai Chung Road, Sha Tsui Road/Tai Ho Road and Sha Tsui Road/Tai Chung Road are already loaded close to or beyond their c capacities. Traffic queues are regularly observed at the approaches to signali~ed junctions along o Castle Peak Road (Tsuen Wan) between Sha Tsui Road and Sai Lau Kok Road in the Kowloon bound direction during the morning peak hours and in the Tuen Mun bound direction in the evening peak. o By 2001, without the Route 5 Extension, major junctions along both CastlePeak Road (Tsuen Wan) c and Sha Tsui Road are expected to be overloaded beyond their capacities by about 30%. This would result in long traftic queues on Castle Peak Road (Tsuen Wan) extending to Tuen Mun Road thereby o blocking the Kowloon bound movements during the peak hours. Traffic movements along local roads in the vicinity would also be seriously impeded. Most important, any incident on Castle Peak Road o (Tsuen Wan) and Sha Tsui Road causing a reduction in the road capacity would easily bring about c a complete grid-lock to traftic circulation in the area. c The design of the project is' being undertaken' in-house by Highways Department who have commissioned Mott MacDonald Hong Kong Limited to carry out an environmental impact assessment o (EIA). Full details of the EIA are presented in the Final Assessment Report. This Executive Summary presents the main findings, conclusions and the recommendations of the study. The location c of the new road and its alignment are shown on Figure 1. ' c The ErA Study has been carried out to a Brief prepared by G_overnment and agreed with Government Departments prior to the start of the work. The work has been managed by a Steering Group chaired c by Highways Department with technical issues resolved in a Working Group chaired by EnvirollIl]ental Protection Department (EPD). The key issues that have been considered and evaluated c include air, water and noise pollution during construction and operation of the project, together with c visual impact and impacts on the ecology of the area. c Sensitive receivers were identified in accordance with the recommendations of the Hong Kong Planning Standards and Guidelines and the existing environmental framework was determined from c data collected by EPD at their routine monitoring stations, supplemented by site inspections. A' c comprehensive noise monitoring survey was carried out to determine the background noise levels. c c c c 1 c ---~--- c c c Final Assessment Report Doe. Ref : T3S0/0S Executive Summary Rev. No. :E c c Project Description The new road will be a high speed dual carriageway constructed partly on a new alignment and partly c by improvement of the existing Castle Peak Road. The new road will start at its eastern end with c improvement works to the TsuenKam Interchange where an underpass will be constructed. The road will then run in a westerly direction parallel to and to the north of the Mass Transit Railway (MTR) c line and to the south of the slope leading up to Route Twisk before crossing the MTR on an , overbddge close to the China Dyeing Works site. A new development is being constructed at the c China Dyeing Works site over the new road which will pass through the podium of the development in runnel. To the west of the China Dyeing Works redevelopment site the new road will be at-grade o along the existing Castle Peak Road. The existing junction between Castle Peak Road and Tsuen King Circuit will be modified to accommodate the flyover for Route 5 and to improve traffic flow. c The project limit at the western end will be at the intersection with Tuen Mun Road in Chai Wan Kok o where new slip roads to the existing interchange will be constructed. o Environmental Framework Land uses in the Study Area are mixed and range from recreational, residential, commercial and, o industrial in an urban environment to semi-rural and squatter type developments and established plantations and ,woodland. Residential and other land uses which will be sensitive to environmental o impacts are shown on Figure 1 and will include the following (from ,east to west): c o high rise residential blocks in the vicinity of Tsuen Kam Interchange. These include Shek o Wai Kok Estate and Fairview Garden; c o predominately low rise village houses in Hoi Pa Village South Terrace (due to be completed in 1995) and along Route Twisk (Pak Tin Pa Tsuen, Nam Tin Chuk, Muk Min Ha Tsuen, c Pak Yin Pa and Pak Tin Pa San Tsuen). Nam Tin Chuk is further from the proposed new road than the other villages but includes the Tung Lam Home for the Aged and a sitting out o area at the southern extremity of the village; o o high rise residential blocks at Luk Yeung Sun Chuen above the MTR depot. Kwai Ming Wu o Memorial School of the Precious Blood is located to the west of this development; c o the proposed new development at the China Dyeing Works site will comprise high rise c residential blocks on a podium; and o high rise buildings along Tsuen King Circuit and Castle Peak Road to the west of the China c Dyeing Works site. These include a proposed development by Nam Fung Textiles. c The Study Area is already affected by noise and air pollution with impacts from industry and road traffic being key issues. Road traffic noise levels are particularly high with some residential blocks c experiencing noise levels as high as 76 dB(A) according to measurements take during the EIA Study. Air pollution measured at the EPD monitoring station at Tai Ho Road, Tsuen Wan shows levels of c about half the Air Quality Objectives. Water courses are relatively unpolluted in the upper parts of the catchment but pollution levels increase further downstream due to pollution ftom the urban and c industrial developments. The nearest nature conservancy area to the Study Area is the Tai Mo Shan c Country Park, about O.7km to the north but there are no Sites of Special Scientific .Interest or other Special Areas in the Study Area except for the Tang Clan Ancestral Grave, a Site of Archaeological c and Historical Interest. This site has not been assessed in this Study. ' c c 2 c c c c Final Assessment Report Doe. Ref : T3S0/0S c Executive Summary Rev. No. :E c Environmental Impacts during Construction c The analysis of potential air and water pollution during construction has shown that there are not likely to be any impacts which exceed the standards recommended by EPD, although strict dust c control will be required throughout the works. The EIA Study has recommended environmental monitoring and audit to ensure that these impacts are kept under control by the contractor. Because c there are no vegetation or fauna of conservation significance, the consequences of the works in terms c of Hong Kong's overall botanical or ecological resources are minimal. Noise from construction should be limited to Leq (30 min) 75 dB(A) during the daytime. It is o possible that this level could be exceeded on occasions but the contractor will be required to implement mitigation measures to control the noise. Night working will only be required on a few c occasions and noise during these periods will be controlled under the Noise Control Ordinance. Noise c barriers and enclosures will need to be used during construction to reduce the noise to meet the recommended maximum levels. The largest impacts during night working will be in·the vicinity of o the China Dyeing Works site where night possessions for works above the MTR will be required. Noise Control clauses will be specified in the works contract to control the noise impact during o construction. Options for mitigation of construction noise will include:
o o use of silenced equipment; o scheduling activities tb avoid parallel operations of several sets of powered mechanical c equipment; c o siting of equipment as far as practicable from noise sensitive receivers; and o use of temporary enclosures and/or noise barriers placed close to the noise sources to screen o specific receivers. c The EIA report has recommended mqnitoring and audit of noise throughout the construction. For construction during normal working (unrestricted) hours (0700-1900 hours) impact monitoring should c comprise L", (30 minute) taken at least twice per week. Impact monitoring for construction outside normal working (restricted) hours (1900 - 0700 hours) should comprise L", (5 minute) taken twice o per day, once in each of the restricted periods, unless complaints are received in which case more frequent measurements will be necessary. The precise programme for impact monitoring should be o . determined when details of the contractor's programme for construction are known.
c Environmental Impacts during Operation c The key issue during operation will be impacts from traffic noise. The study has also considered air c and water pollution but has concluded that these will meet current standards. Similarly, there will be no significant visual or ecological impacts. The air pollution within the tunrel through the China c Dyeing Works redevelopment has been assessed and found to be within the standards recommended by EPD. Similarly air pollution from vehicles travelling along the road will not cause Air Quality c Objectives to be exceeded at any.of the sensitive receivers.
c . The traffic noise impact study identified the sensitive receivers and noise measurements were made c to establish the baseline noise levels .. Trafticpredictions (shown in Table I) for the proposed new' road, provided by Transport Department, were used to predict noise levels for the year 2011. The c traffic noise impact assessment followed the techniques given in the UK Department of Transport's "Calculation of Road Traftic Noise'" as recommended in the Hong Kong Planning Standards and c Guidelines. c
c 3 c ------c c c Final Assessment Report Doe. Ref : T3S0/0S Executive Summary , Rev. No. :E c The EIA has identifi~that about 4;300 dwellings and two schools will be affected by traffic noise c which will exceed the noise standards once the road extension is in use. To ameliorate the future traffic noise problem, apackage of direct technical remedies in the form of open-textured road surface c on the full length of the road and road cover, partial enclosures and noise barriers along sections of c the Route 5 extension and the existing roads within the project area have been incorporated, wherever practicable, into the project proposal. Noise barriers will be retlective or absorptive and will c incorporate vision panels where necessary-to avoid compromising sight lines. The recommended package of direct techniCal remedies is shown on Figure 1. The capital cost of the mitigation c -measures will be about HK$266 million out of the estimated total capital project cost, including noise mitigation measures, of HK$1000 million. The existing and predicted trafticnoise levels and the o effects of the mitigation measures on the identitied noise sensitive receivers are shown on Figure 2. The EIA indicates that with the incorporation of the proposed mitigation measures, no existing c dwellings will be eligible for indirect technical remedies in- the form of window insulation and air o conditioners. o Conclusions o The section of Route 5 from Shek Wai Kok to Chai Wan Kok is a priority project to reduce traffic o congestion and environmental impacts in the central parts of Tsuen Wan. The EIA Study has considered the magnitude and acceptabilityof all environmental impacts from the o project and has concluded that the key issues will be noise during construction and operation. o Mitigation measures have been considered to reduce noise from traffic and road enclosures ana barriers have been recommended along parts of the road together with the application of a low noise c road surfacing. c o o o o c o c c c c c c c c 4 ( c c c Final Assessment Report Doe. Ref : T350/05 c Executive Swnmary, Rev. No. :E c Table 1 2011 AM Peak Trafflc in Veh/Hr o . Road Link c Direction Trafflc Flow Total Vehicles % Heavy Vehicles c Route 5 o Cheung Pei Shen to W/B 1500 50 ' Tsuen Kam Interchange E/B 800 72 o Route 5 Tsuen Kam Interchange W/B 2400 57 c to Castle Peak Road E/B 2400 53 Slip Road from Route 5 E/B 1600 43 c to Tsuen Kam Interchange Slip Road from Tsuen Kam W/B 900 69 o Interchange to Route 5 , Castle Peak Road (at grade) o Tai Chung Rd to Tai Ho Rd N W/B 1000 94 E/B 1600 39 o Route 5 to Tai Chung Rd ' W/B 1400 40 o E/B 1900 40 () Sha Tsui Rd to Route 5 W/B 3800 52 E/B 4200 49 o Chai Wan Kok Interchange W/B 2000 48 o to Sha Tsui Rd E/B 2600 40 o Tuen Mun Rd W/B 1300 59 E/B 1500 63 o Tai Chung Rd W/B 600 38 E/B 700 42 o Tsuen King Circuit W/B 200 4 o E/B 200 11 . Route Twisk W/B 1100 71 c E/B 900 37 Cheung Pei Shen Rd W/B 900 37 o E/B 1200 59 Tai Ho Road North W/B 1200 35 c E/B 700 49 Texaco Road North W/B 2300 60 c E/B 2200 49 c Wai Tsuen Rd W/B 300 54 E/B 500 34 c • c c c c 5 c c c c c c· c c c CE 38/92~I%~ c c c o c o o c o c o o o o o o o c c c c c c c c c --.. -.---"-~-'--' -- c c c c c
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Noise Barriers o 'f:!Wi'>fr.tll! Semi-Noise Enclosure o ijjJlf Barrier ~~ j\!I Type l"ili!:(*) Heigbt (m) rmma Low Noise Road o B,D Vertical i!'1l: 4 H;;\;:\/iJ/}}!!i!g) C,O Curved +!/i!li 6 Surface o H,J Vertical i!'1l: 5 :11!11!~i!!\ il!i p Vertical (Absorptive) i!' 1l: ( ,» ~ ) 4 o .. c o 1111 Figure 1 o ilJk:g~iI'lmDfgtLli: Location of Noise Mitigation Measures o ~ 3:l'i~2:l'i Sheet 2 of 3 o o o o o o o o o o o o o o o o o o o o o o o m o o o ~lil!lll i /. I1I1111111111 Enclosure o , l. iiililli~ o ...... Noise Barriers liIIlIII Barrier Low Noise Road o /j // Surface l!1:llIi!liJ!i'}OO .. ,nU,o '0 .' / N Vertical l!i: i1[ o - ...... 8 .' c o . ~ l Figure 1 o LocatIOn of Noise Mitigation Measures o (~ 3][:§g3][) Sheet 3 of 3 o o o ...... _-- o o o o o o o o o \ o o o o o o DJ o o o o .. ' o IiI f3iU : o Legend: , , *!Ii\Hf~tl1 o ,., , Semi-Enclosure -, ' o "... I I \>J, ~ ' Low Noise Road Surface o lMHf ilJ\ iRl '._- ( ~ '. o ...... Noise Barriers illHf ill ~ IfIl~ t~ ID' Type .. !It, .",) Height (m) C, Barrier Vertical if! 11 3 ----- Noise .Barrier M!1ifillJlf ""0".0 '0 L C .... ee 8 C I· o 1Il2 Figure 2 o Noise Sensitive Receivers ~~8til!J/!if~I!lOjjlJ~.El:.I!lkif~W and Noise Impact o <. ~;lJr~ 1Jr) _(Sheet 1 of 3) ••• 1 o Hoi Pa Village ~18t-J Pa;" Tin Pa T~uen "'EEi8t-J o Shek Wai Kok North E~;€E!Fj;~:ill Shek Wat Ko~ West ;S::ll~*'l§~ o Fairvie'/1 Garden '§o:;tial LYSe BK A,North b?i$i7EA2!;'t;:g; o LYse BK A. West i!k iJ>",,"1.\ 1!! 2!i ilii o Kwai ~ing Wu School {E~6~1,j!iji' LYSe BK F.~orth iO 31 76 76 17 o , "75 17 "57 " " 17 "12 " " " 77 "68 " " " 77 o "16 " " " 18 " " " o 20 " " " 111191J: Fairv;ew, Garden i$:~fl'JI!iJ!ll'!l!;!<!!I6&'!ill'!li". o *------"50 77" " " " "1 58 1 67 i 66 67 1-- !J!(iO'Ifl'JI!il!ll';"I&JtflI..S&I!iI!ll'l>iiliIJ "18 72 75 " " " 20 75 " "77 "77 I ~.- i$1I1JlIl: 22 "SJ 75 " 77 77 o 89 75 77 TI i'i!ii1i£i!11 o o o o o o o o o o ,, ,., , .' I...... o . 1,. ',-- , Legend: :il011: Kam Fung Garden }I!~nl * ----- Location of NSR o 1!i!:0008'JIW!'lfJilii:~I.llii;'ll'lfIl'W Tsuen Tak Garden :;;:!!lEili *------11121158167 166 167 - NSRs and Noise Predictions 1 I 21 ! 58 i 67 I 66 , 67 I 1!i!:",9'iIlll!'If!ilii:~m,\lii;lllI!fli!lU Recommended Option Joyful Garden 'i(~rcili o ~.n¥ I Low Noise Surfacing Nan rung School ""'il'f.!!!& ~.3. :"''ll'lf!i;;ilii!!ii9'i'll 'lfe''" Do Nothing o NFD. T·l/F·l :1il!r~~$~~~;GiID ~~~~~rs~8i1~~~!~z;:;. ~~il;i!:g.7.km: Existing NFD. H!F 1 ~~n'J~%§~$-@: 'i,9/'iTi