Road 1/8

PRESENT STATE OF METROPOLITAN EXPRESSWAY (MEX) – 1/2

Structural aging is spreading, where ones’ above 40 years occupies more than 30% (approx. 100 km inlength) and above 30 years does nearly 50% (approx. 145 km) to the whole.
Years in Service (As of April 2012 )Tohoku
EXPWY

Joban
EXPWY

30.9 km
10.2%

Saitama Pref.

97.5 km50.4 km

32.4%

16.7%

Total Length

Chiba Pref.
Tokyo
Metropolis
Chuo EXPWY

301.3 kmKeiyo Road
Higashi-Kanto EXPWY

74.4 km24.7%

Meishin EXPWY> 40 yrs

48.1 km16.0%

30 - 39 yrs
20 - 29 yrs
10 - 19 yrs< 9 yrs

DaisanKeihin
RoadYears in Service and Ratios (As of April 2012 )Kanagawa Pref.
> 40 yrs – Inner Circular Route and Haneda,Meguro, Yokohane Lines
30 to 39 yrs – Fukagawa, Mitsuzawa Lines
20 to 29 yrs – Misato, Kawaguchi, Kariba Lines
10 to 19 yrs – Daiba, Omiya Lines< 9 yrs – Kawasaki Line and Central Circular Route

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Road 2/8

PRESENT STATE OF MEX – 2/2Structural type of viaducts, tunnels and semi-underground take up the majority with very high ratio at 95% torequire much time and energy for maintenance.
100%
At Grade
Semi-underground

土工
15.4(5%)15.4km(5%)
半地下18.5(6%)
18.5km (6%)
トンネル28.9

Tunnel28.9km (10%)
(10%)

75%

Ratio of viaduct, tunneland semi-undergroundat 95% approx.

2,251

At Grade
土工
2,251km (95%)(95 %)

50%

5,871
At Grade
土工
5,871km (75%)
(75%)

238.5

Viaduct
高架橋
238.5km(79%)(79%)

Tunnel
37km
トンネル
(2%)

37(2%)

25%

高架橋
Viaduct71km
71(3%)(3%)

0%Metropolitan
首都高速Expressway

Metropolitan
都道Local Road

Copy right (c) 2013 Ministry of Land, Infrastructure, Transport and Tourism, Japan, All rights reserved .

Tunnel
トンネル 809
809km (10%)
(10%)

高架橋
Viaduct 1,156
1,156km (15%)(15%)
NEXCO National
Expressway

高速国道（NEXCO）

Structural Type Ratio as of:Metropolitan Expressway – Apr 2012
Metropolitan Local Road – Apr 2007
NEXCO National Expressway – Apr2012

Road 3/8

SEVERE USAGE OF MEX

 In addition to high ratio of aged structure, heavy vehicles’ usage counts 5 times of metropolitan localroads’.
 Annual traffic violation by over-loading counts approx. 350,000.

20,00020,000250,000

17,975201,257
200,000

Nearly 5 times
12,00012,000

9,730
8,000
8,000

Number of Vehicle（Number of Vehicle/day）

16,00016,000150,000

100,000

3,854

4,000
4,000

350,000 Nos./Yr

50,00076,81229,815
15,437

9,568 5,288

3,131 2,125 3,919

000
首都高速
Metropolitan
Expressway

Metropolitan
都道
Local
Road
（23区）

高速自動車国道
National
Expressway

Heavy Vehicles’ Usage Comparison
Source: Road Traffic Census 2010

Copy right (c) 2013 Ministry of Land, Infrastructure, Transport and Tourism, Japan, All rights reserved .

Axle Load

Over-loading Violation
Weighed at MEX toll booths in 2008

Road 4/8

Structural Inspection and Repair at MEX
 Check structural soundness by both daily and periodic (detailed) inspection
 Repair immediate for urgent damages and program routine for non-urgent ones
INSPECTION

Periodic

Daily

Close Inspection fromLifted Platform

Close Inspection from
Suspended Platform

Walk-around
Inspection

Patrol Inspection

REPAIR

Paint
Deterioration

Pavement
Re-paint

Cracks

Copy right (c) 2013 Ministry of Land, Infrastructure, Transport and Tourism, Japan, All rights reserved .

Expansion Joint
Re-paveBroken

Re-installAgainst Increasing Damages from Progressive Aging and Severe Usage Road 5/8

Exercise PDCA cycle for structural inspection and repair
Implement damage assessment for ranking into A to D categories
Carry out immediate repair on Rank A damages
Do routine repair on increasing Rank B damages
INSPECTION & REPAIR FLOW
点検・補修システム
PLAN
計画

CHECK (for repair)
判定
Rank A

Ａランク（要緊急対応）(Immediate)

ACTION対応
Temporary or
Permanent Repair

応急措置 （恒久措置）

Rank B

Ｂランク（要対応）(Routine)DO
点検

Examples of Repairs on Rank A (Immediate Repairs)Repair/Reinforce
補修・補強

Rank C
Ｃランク（対応不要）(No action)
Rank D
Ｄランク（異常なし）(No damage)

RecordResults
点検結果入力Next Routine
次回定期点検コンクリートの剥落
Flaking
Record Actions
対応状況入力伸縮継手の損傷
Broken Joint

Examples of Repairs on Rank B (Routine Repairs)

Database - Metropolitan Expressway
データベース
Maintenance Technical Information Service（保全情報管理システム「ＭＥＭＴＩＳ」）(MEMTIS)
Rank A
Ａランク

Immediate repair needed to prevent damages to public etc.
緊急対応が必要な損傷（第三者被害の恐れ等）

Rank B
Ｂランク

Programmed routine repair needed
計画的に補修が必要な損傷

Ｃランク
Rank CNo need for repair but damages be recorded
損傷が軽微なため対応は不要（損傷は記録する）

Ｄランク
Rank DNo damages but inspection be recorded
損傷なし（点検は記録する）

Copy right (c) 2013 Ministry of Land, Infrastructure, Transport and Tourism, Japan, All rights reserved .

Cracks on Slab
床板のひび割れCorroded Bearing

Road 6/8

Increasing Damages at MEX

Due to progressive aging and long-term severe usage, cumulative damages (Rank A and B) counted nearly
100,000 at the end of FY2011.
Progressive Damages Rank A and B
140,000

120,000

100,000
80,20080,20096,60096,60096,60096,60097,60097,600

2009
平成21年

2010
平成22年

2011
平成23年

84,40084,40080,00060,70060,70051,40051,40060,00043,90043,90040,00046,90046,90035,70035,70020,0000
2002
平成14年

2003
平成15年

2004
平成16年

2005
平成17年

Damages found
損傷発見件数

2006
平成18年

2007
平成19年

Damages repaired
損傷補修件数

Copy right (c) 2013 Ministry of Land, Infrastructure, Transport and Tourism, Japan, All rights reserved .

2008
平成20年

Damages remained
要補修損傷件数(期末)Road 7/8

MEX COMMITTEE FOR LARGE-SCALE RENEWAL
Cost estimate for large-scale renewal sums up 7.9 to 9.1 Billion US$.
Sections to Require Large-scale Renewal or Repair
Examples of Section for Potential Renewal

Route 1 Haneda Line – Higashi Shinagawa Viaduct(Marine Section)⑧⑦⑤⑪④⑥ ⑩⑨Flaking Caused byRebar Corrosion

・銀座～新富町②①Examples of Section for Potential Repair
③桟橋
鮫洲埋立部

Conc. Slab
ｺﾝｸﾘｰﾄ床版

Renewal :15km

Carbon炭素繊維シート
Fiber FabricRebar

ひび割れのRestrict
Crack
Movement
開閉動を抑制Repair : 28km

Repair or Renewal (need more study): 4km
Renewal (Semi-underground Section): 1km

Copy right (c) 2013 Ministry of Land, Infrastructure, Transport and Tourism, Japan, All rights reserved .

Reinforcement withCarbon Fiber Fabric(Before Coating)ISSUES AT LARGE-SCALE REPAIRS/RENEWAL

Road 8/8

 Efforts for Implementation of Large-scale Repairs/Renewal
1. Seek public understanding
2. Corporate close between Central Government and local governments
3. Develop technology and train specialists
4. Reinforce daily inspection
5. Examine when to implement large-scale renewal
6. Minimize adverse effect to public due to large-scale renewal
7. Facilitate harmonization with urban environment
 Efforts to Meet Public Demands
1. Examine city planning to contribute to its reform
2. Make urban environment attractive
3. Reinforce urban function against disasters
 Efforts to Secure Budgets
Source: Suggestions made by MEX COMMITTEE FOR LARGE-SCALE RENEWAL, 15 JAN 2013

Copy right (c) 2013 Ministry of Land, Infrastructure, Transport and Tourism, Japan, All rights reserved .