Reducing Traffic Jams Utilizing ITS Reducing Traffic

Reducing Traffic Jams Utilizing ITS Reducing Traffic
Reducing Traffic Jams
Utilizing ITS
1)Test to Reduce Traffic Jams
 To prevent traffic jams at sag, inform drivers of appropriate
driving speed and driving lane
 Collect traffic data from Road Side Unit (RSU) and automatically
set speed and distance from vehicle ahead
with Adaptive Cruise Control (ACC).
 Develop smart car by increasing ACC speed.
Provide appropriate
info. to drivers
Traffic Flow Sensor
V-I RSU
Should stay in
cruise lane
*Cooperative
project with five
vehicle companies,
including Nissan,
METI, etc.
Passing lane is getting congested,
but cruising lane is not congested.
60% of traffic jams in expressway occurred in sag or tunnel
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2013 All rights reserved.
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1)Test to Reduce Traffic Jams –ACC Inter-vehicular distance automatic control system, or Intelligent
cruise control system, keeps distance from vehicle ahead at the
speed set in advance, or maintains the appropriate speed in
case there is no vehicle ahead, collecting information from a
sensor installed at the front-side of vehicle.
http://www.nissan-global.com/JP/TECHNOLOGY/OVERVIEW/icc.html
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Copyright NISSAN MOTOR CO., LTD.
2013 All rights reserved.
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1) Effectiveness of ACC
 ACC enables more stable driving in case of less speed
volatility of vehicle ahead than manually driven car.
ACC (70km/h)
Sag (Up-hill)
Manual Driving (70km/h)
Sag (Up-hill)
Altitude
Distance
Distance
Test results of driving in a row with ACC vehicle
Lead vehicle
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1)Harmonization of road and ACC
 Road operation center shares recommended speed
and time between vehicles to ACC-equipped vehicle.
 Then ACC vehicles lead others at the recommended
speed and control distance.
Traffic Control Center
RSU
Road Side Unit
(RSU)
ACC car
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Ordinary car
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2013 All rights reserved.
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Launched
in 2011
2) ITS Spots Service
 Road to vehicle communication using
ITS spots on highway
+
Car Navigation
ITS Spot Unit
Safety Drive Support
Alert drivers to avoid accident
<Three basic services>
-Dynamic Route Guidance System
(DRGS): Obtain traffic data and select
quickest routes through car navigation.
-Safety drive support:Avoid accident by
alerting drivers of falling objects, for
example.
-ETC: Deliver ETC service.
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2013 All rights reserved.
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2) ITS Spots Service –DRGS Collect all highway traffic data in Tokyo Metropolitan
area through ITS spots and provide the quickest
route guidance through car navigation.
Scope of distributing traffic information
北関東道
岩舟JCT
東北道
藤岡JCT
北関東道
岩舟JCT
東北道
藤岡JCT
友部JCT
友部JCT
関越道
20km
20km
関越道
常磐道
潮来IC
常磐道
Location
of vehicle
潮来IC
東関東道
東関東道
大月JCT
大月JCT
中央道
中央道
東名高速
御殿場IC
Destination
Tokyo Metropolitan
Area
館山道
富浦IC
Scope in the past
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東名高速
御殿場IC
Destination
Tokyo Metropolitan
Area
館山道
富浦IC
Copyright NISSAN MOTOR CO., LTD.
2013 All rights reserved.
Scope of ITS Spots
7
2) ITS Spots Service
 ITS spots increased to 166 spots in Mar 2011 on
Metropolitan Expressway
美女木JCT
戸田西IC
和光北IC
和光IC
江北JCT
本木
大泉IC
小菅JCT
泉JCT
板橋JCT
堀切JCT
熊野町JCT
谷河内
1号線
中央
環
状新
宿
線
入谷
両国JCT
西新宿
高井戸
箱崎JCT
江戸橋JCT
晴海線
青葉台
台場
池尻
東京IC
辰巳JCT
白金本線
葛西JCT
有明JCT
中央環状品川
線
用賀IC
5
池袋
5号池袋線
戸越
大井JCT
玉川IC
竹
JC
第
三京
浜道
路
川崎
凡例
神田
JC
1号線
東海JCT
京浜川崎
IC
江戸橋JCT
箱 JC
三宅坂JCT
東京湾
鈴ヶ森
昭和島JCT
空港中央
3号渋谷線
100km
谷町JCT
川崎縦貫線
3
渋谷
殿町
富士見
一ノ橋JCT
Installed about 1,600 ITS spots
on highways throughout Japan.
浜崎橋JCT
港北IC
2 2号目黒線
目黒
横浜環状北線
東京
都心環状線
● In service
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川崎浮島JCT
1
1号羽田線
羽田
湾ア
ク
アラ
イン
● Service started from Jan to Mar 2011
Source: METI
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2013 All rights reserved.
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2)Safety Driving Support in Black Area
 Traffic jams at a curve with a high accident incidence were
identified through ITS spots, and the driver was alerted.
 The system contributed to a 60% reduction of traffic
accidents in this area.
情報提供地点周辺
この先渋滞
追突注意.
この先急カーブ 速度落とせ
新宿方面
♪この先渋滞しています。
注意して運転してください
合流車両により
渋滞が多発
参宮橋カーブにおける事故数の変化
180
参宮橋カーブ
R=88m
135
150
総事故件数(件/年)
新宿カーブ
R=85m
♪この先、事故多発地点です。
スピードに注意
実験開始後事故が
60%減った
143
明治神宮
代々木方面
情報提供地点周辺
首都高速で最も
事故が多い地点
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事故発生数
120
90
60
30
75
30 26
42
71 55
0
14年度15年度16年度17年度18年度19年度20年度21年度
2002
2003 2004
2005
2006kp)での事故数
2007 2008 2009 FY
参宮橋カーブ
(5.182
kp-5.29
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2013 All rights reserved.
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3)Smooth Driving by Harmonizing
Traffic Signals
 Road Side Units (RSUs) distribute traffic signal
rotation schedule to drivers.
Red signals
Distance
Time
Speed limit
Recommended speed
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Copyright NISSAN MOTOR CO., LTD.
2013 All rights reserved.
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4)Concept of Signal Control
 Green signal on street with light traffic volume will
cause congestion on intersecting street.
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4)Concept of Signal Control
<Light traffic volume>
<Light traffic volume and
green signal>
Unable to change signal cycle
(Green/Yellow/Red)
Drivers tend to increase speed,
and pedestrians tend to ignore
the signal
Wasted time at green signal
and resultant traffic jams
Cause traffic accident
Maintaining constant distance between
vehicles for traffic flow is necessary
 Harmonize vehicles and roads by advanced signal
controls and realize better traffic flow with constant
inter-vehicular distance.
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Copyright NISSAN MOTOR CO., LTD.
2013 All rights reserved.
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4)System of Signal Control
Step2
Step 3
Step 1
 Step 1: From road side unit (RSU) near signals, inform driver of
recommended driving speed through car navigation.
 Step 2: With a leading vehicle reducing speed to a
recommended rate, and with other vehicles following the lead
vehicle at a constant distance, a group of vehicles forms that
maintains a constant distance and appropriate speed.
 Step 3: By identifying speed of all vehicles through RSUs, better
control signal changes for better traffic.
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Copyright NISSAN MOTOR CO., LTD.
2013 All rights reserved.
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4)Signal Controls harmonizing vehicles
 By identifying speed of all vehicles through RSUs,
better control signal changes for better traffic flow.
Sensor
Sensor
距離
time
Red
Green
Recommended
speed
Speed limit
Case of normal traffic signal cycle
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Switch to Green
signal
Switch to Red after a
group of vehicles
passing
Case of signal control
by approaching a
group of vehicles
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2013 All rights reserved.
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Accel
OFF
Signal Information
Drive System
(SIDS)
Confirm
road ahead
歩行者有
Driving Safety Support
System (DSSS)
For a Greener & Safer Traffic Society
1600 RSI nationwide
ACC
CACC
ITS Spots
Emergency Evacuation
in tunnel
Mobile NW
Emergency
Alert
→
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Copyright NISSAN MOTOR CO., LTD.
2013 All rights reserved.
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