1. (Expressway Traffic Management System)
E T M S
(Expressway Traffic Management System)
By Sukkee Hong
Korea Expressway Co. (KEC)

2. Contents Objectives of ETMS Highway, Expressway & Freeway
Traffic Information
Shoulder utilization
Ramp Metering
HOV Lane
Electronic Toll Collection
Recurring congested areas
Traffic management for big holidays

3. Highway, Expressway & Freeway
Highway is “a main road intended for travel by the public between important destinations, such as cities and towns” - Wikipidia -
Expressway is “a high speed divided highway for through traffic with access partially or fully controlled and grade separations at important intersections with other roads” Webster –
Freeway is “1. an expressway with fully controlled access. 2. a toll-free highway” - Webster –

4. Objectives of ETMS
To reduce the impacts and occurrence of recurring congestion
To minimize the duration and effects of nonrecurring congestion
To maximize the operational safety and efficiency of the public traveling
To provide facility users with information
To provide solutions to users who have encounter problems

5. Collecting Traffic Info
monitoring real-time traffic condition
identifying the location and causes of any operational problems that occur
VDS
Camera
Camera
Detector
Video detector
Hi-Pass
Patrol car
Driver

6. Providing Traffic Info
Informing travelers of real-time data about running speed, traffic situation, accidents, maintenance works, weather, etc

7. Traffic Info Center

8. Shoulder utilization
To enhance efficiency of existing road infrastructure
Vehicles can utilize the shoulder but only at green light,
which is turned on during the rush hours
It is installed by traffic lights, strengthening the surface and narrowing lane widths from 3.6 meters to 3.5 meters
Cameras check for the cars

9. Shoulder utilization – cont.
At present, it is operated in 149 km expressway with 24 sections nationwide.
According to the analysis of its effect, the average running speed in the sections implemented has increased 29 km/h from 49 to 78 km/h.
It is planned to extend to 193 km with 27 sections in 2013.
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10. Ramp Metering
To reduce turbulence in expressway flow near the ramps and improve overall expressway operation by managing traffic volume in expressway.

11. Ramp Metering – cont. Implementation places Installation criteria
Four interchanges in Seoul Belt Expressway
Installation criteria
Mainline running speed is less than 70 km/h.
The operating time is 7 am to 8 pm.
Signal is operated flexibly by traffic situation.
Effect
Average running speed has increased 8 km/h from 42 to 50 km/h.
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12. HOV (high-occupancy vehicle) Lane
To give priority to high-occupancy vehicles to go faster
To carry more passengers by the same traffic volume
44.8 km from 7 am to 9 pm on weekdays in Gyeongbu Expressway
141 km from 7 am to 9 pm on weekends & holidays
7 am to 1 am next day on big national holidays like Thanksgiving

13. HOV (high-occupancy vehicle) Lane – cont.
Permitted vehicles
More than 9 – passenger vans or buses
Less than 12 – passenger vans are allowed only with more than 6 passengers
Penalties for violation
55 USD fine for passenger cars and 65 USD fine for vans
30 penalty points
Lane
The first lane from inside, distinguished by blue line
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14. Electronic Toll Collection
To pay tolls automatically without stopping
Wireless communication between an electronic unit in the car and an antenna at the toll gate makes it possible
An ETC lane can deal with 3 to 5 times more vehicles than an ordinary lane.
Around 2 mil. vehicles daily, 58% of the total of expressway vehicles, are using it.

15. More than two hours a day
Recurring congested areas
Criteria
Running speed
Duration
Occurrence
Weekdays
Less than
40 km/h
More than one hour a day
More than 8 days a month
Weekends
More than two hours a day
More than 4 days a month
Status of the current recurring congested areas
Total
Weekdays
Weekends
373 km
(51 sections)
149 km
(26 sections)
199 km
(20 sections)

16. Traffic Management for big holidays
Big holidays in Korea
Seolnarl, Jan. 1st in lunar calendar
Choosuk, Aug. 15th in lunar calendar
Traffic management
To organize T.F. teams at the Traffic Center and branch offices during 24 hours
To control traffic volume at interchange toll gates.
To open new roads or widened roads before the holidays as much as possible.
To provide traffic forecast to the public
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