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Ro b e r t L. Be r t i n i
Portland State UniversitySeptember 26, 2003
Usi n g A r c h i v e d
St op - Leve l Tr an si tGeo-Loca t ion Dat af or I m p r ov edOp e r a t i o n s a n dP e r f o r m a n c e
M o n i t o r i n g
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O b j e c t i v e sO b j e c t i v e s
Trends in transittechnologyAVL and APC
BDS system and dataarchivingPreliminary route levelanalysisOther examplesConclusions andfuture research
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Au t o m a t i c v e h i cl e l o ca t i o n ( AVL)A u t o m a t i c v e h i cl e l o ca t i o n ( AVL)
Determination of vehiclelocationGlobal positioning systems
(GPS)SignpostsGround-based radio
Dead-reckoningU.S. transit agencies
128 operational172 planned
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Au t o m a t i c p a ssen g e r co u n t er s ( APC)A u t o m a t i c p a ssen g e r co u n t er s ( A PC)
Count boarding and alightingpassengersInfrared beams
U.S. transit agencies60 operational124 planned
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AVL/ APC i n t h e Ba y A r e aAVL/ APC i n t h e Ba y A r e a
1 9 6 [467]1 8 0 4 [2518]TOTAL
0 [36]312 [362]SamTrans
0 [135]350San Francisco MUNI
00 [37]Western Contra Costa
054 [62]Sonoma County Transit
080 [86]Santa Cruz
0 [100]6 [600]Santa Clara VTA019Napa County Transit
7171Livermore/Amador
0112 [131 by 2005]Central Contra Costa
125800 in 2002AC Transit
APCAVL
Source: APTS Deployment in the United States Year 2002 Update , USDOT, 2003.
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Ar ch i v i n g AVL/ APC Da t aA r ch i v i n g AVL/ APC D at a
AVL not designed with archived data in mind.Most AVL systems do not deliver data for off-line planning analysis.
Transit agencies didnt insist on it.APCs designed with archiving in mind.APCs often only in 10-15% of fleet.
TriMet system driven by APC pays for itself in saved reporting costs
Source: TCRP H-28 , Uses of Archived AVL-APC Data t o I m prove Transit Perform ance and Managem ent .
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A b o u tA b o u t Tr iMetTr iMet
Serves 1.2 M population575 mi 2
62.8 M annual bus trips206,600 daily bus boardings
95 bus routes655 buses8100 bus stops
Also LRT, Paratransit
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Per f o r m an ce m easu r em en tPer f o r m an ce m easu r em en t
Measuring system performance is the first step toward efficient and proactivemanagement.Increasing attention to transit performanceTransit Capacity and Quality of Service Manual
Quantitative/qualitativePassenger point of viewLinked to agency operating decisions
NCHRP Performance Based Planning ManualAccessibilityMobilityEconomic Development
Improve reliabilityReduce variability of system performanceDelayTravel time
Attract more ridersReduce operations costsIncrease productivityLink to service standards
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I n t h e p astI n t h e p ast
Data collection moredifficultLow temporal andspatial resolution
Many people tocollect little data Focus on limited,general, aggregate
measures for externalreportingNatural airconditioning
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TodayToday
Unlimited coverage andcontinuous durationDesign, extract and testspecific measuresActual system performanceData management/processingchallengesNeed for generating relevantmeasures
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Tr iMetTr iMet ss Bu s Disp a t ch Sy st emBu s Di spa t ch Sy st em
On-BoardComputer
Radio
DoorsLift
APC (Automatic PassengerCounter)
Overhead Signs
OdometerSignal Priority Emitters
Memory Card
RadioSys tem
GaragePCs
Radio AntennaGPS Antenna
Navstar GPS Satellites
Control Head
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Tr iMetTr iMet ss Bu s Disp a t ch Sy st emBu s Di spa t ch Sy st em
Sc h e d u l e d e v i a t i o n
Con t r o l HeadCon t r o l HeadPCMI A Car dPCMI A Car d
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Real Tim e Elem en t sReal Tim e Elem en t s
Radio
DoorsLift
APC (Automatic PassengerCounter)
Overhead Signs
OdometerSignal Priority Emitters
Memory Card
RadioSys tem
GaragePCs
Ra d i o A n t e n n aGPS Ant enn a
N a v st a r GPS Sa t e l l i t e s
Control Head
On -B o a r dC o m p u t e r
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Real Tim e Elem en t sReal Tim e Elem en t s
On-boardComputer
GPSLocation
ScheduleData
Radio/CellularCommunications
90 secUpdates
D i sp a t ch a n d Co n t r o l A r r i v a l Pr e d i ct i o n
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Ar ch i v e d El em e n t sA r ch i v e d El em en t s
Radio
D o o r sLi f t
A PC ( A u t o m a t i c P a ss e n g e rC o u n t e r )
O v e r h e a d S ig n s
O d o m e t e rSi g n a l Pr i o r i t y Em i t t e r s
M e m o r y Ca r d
RadioSys tem
GaragePCs
Ra d i o A n t e n n aGPS Ant enn a
N a v st a r GPS Sa t e l l i t e s
Co n t r o l H e a d
On -B o a r dC o m p u t e r
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Ar ch i v e d El em e n t sA r ch i v e d El em en t s
On-boardComputer
GPSLocation
ScheduleData
APC/Lift
PCMIACard
Ev e n t D a t a[ O p e r a t o r ]
Pass up OverloadTraffic DelayTrain/Bridge DelayFare EvasionGraffiti/Vandalism
Stop Data[Automatic]
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Ev en t Da t a : Far e Ev as ionEv en t Da t a : Far e Ev as ion
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Ar ch i v e d El em e n t sA r ch i v e d El em en t s
On-boardComputer
GPSLocation
ScheduleData
APC/Lift
PCMIACard
Event Data[Operator]
St o p D a t a[ A u t o m a t i c ]
Scheduled
Unscheduled
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St o p D a t aSt o p D at a
TIME LINE
DWELLTIME
D O O R O P E N
D O O R C L O S E
ARRIVE TIME
LEAVE TIME
REWRITTEN ARRIVE TIME (IF DOOR OPENS)
STOP LOCATION
1 5 M E T E R S
3 0 M E T E
R S
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St o p D a t aSt o p D at a
R o u
t e N o
.
S e r v i c e
D a t e
L e a v e
T i m e
S t o p
T i m e
A r r
i v e
T i m e
B a d g e
D i r e c
t i o n
T r i p
N o .
L o c a
t i o n
I D
D w e l
l
D o o r
L i f t
O n s
O f f s
E s t .
L o a d
M a x
S p e e d
P a t
t e r n
D i s t a n c e
X C o o r .
Y C o o r .
14 01NOV2001 8:53:32 8:49:15 8:53:28 285 0 1120 4964 0 0 0 0 0 21 41 10558.58 7644468 676005
14 01NOV2001 8:55:00 8:51:41 8:54:46 285 0 1120 4701 4 0 0 0 1 20 50 15215.05 7649112 67632814 01NOV2001 8:56:22 8:52:00 8:55:08 285 0 1120 4537 36 3 0 6 0 26 34 15792.35 7649674 676220
Route NumberVehicle NumberService DateActual Leave TimeScheduled Stop TimeActual Arrive TimeOperator ID
DirectionTrip NumberBus Stop Location
Dwell TimeDoor OpenedLift UsageOns & Offs (APCs)Passenger LoadMaximum Speedon Previous Link
DistanceLongitudeLatitude
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Tr iMetTr iMet ss Bu s Disp a t ch Sy st emBu s Di spa t ch Sy st em
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St o p D a t a : Pa sse n g e r M o v e m e n tSt o p D a t a : Pa sse n g e r M o v e m e n t
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Rou t e 1 4 Case St u d yRou t e 14 Case St u d y
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Rou t e 1 4 Case St u d yRou t e 14 Case St u d y
7.9 miles long
105 scheduled trips per weekday64 scheduled stops40-45 min scheduled trip time (mean 43.3, SD 2.7 min)
3-55 min headways (mean 11.4 min)Focus on two weeks April 1-12, 2002 [>1000 runs]Morning inbound from SE 94th/Foster to NW 4th/HoytCrossing Hawthorne Bridge
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Ap r i l 1 A .M. I n b o u n d Tr i p sAp r i l 1 A .M . I n b o u n d Tr i p s
0
1
2
3
4
5
6
7
5:00 6:00 7:00 8:00 9:00 10:00 11:00 12:00 13:0
D i s t a n c e
( m i l e s
)
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Ap r i l 1 A .M. I n b o u n d Tr i p sAp r i l 1 A .M . I n b o u n d Tr i p s
0
1
2
3
4
5
6
7
5:00 6:00 7:00 8:00 9:00 10:00 11:00 12:00 13:0
D i s t a n c e
( m i l e s
)
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Ap r i l 1 A .M. I n b o u n d Tr i p sAp r i l 1 A .M . I n b o u n d Tr i p s
0
1
2
3
4
5
6
7
5:00 6:00 7:00 8:00 9:00 10:00 11:00 12:00 13:0
D i s t a n c e
( m i l e s
)
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Ap r i l 1 A .M. I n b o u n d Tr i p sAp r i l 1 A .M . I n b o u n d Tr i p s
0
1
2
3
4
5
6
7
5:00 6:00 7:00 8:00 9:00 10:00 11:00 12:00 13:0
D i s t a n c e
( m i l e s
)
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Ap r i l 1 : Tw o I n b o u n d Tr i p sAp r i l 1 : Tw o I n b o u n d Tr i p s
0.0
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8:30 8:45 9:00 9:15 9:30
Time
D i s t a n c e
( m i l e s
)
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Ap r i l 1 : Tw o I n b o u n d Tr i p sAp r i l 1 : Tw o I n b o u n d Tr i p s
0.0
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8:30 8:45 9:00 9:15 9:30
Time
D i s t a n c e
( m i l e s
)
Trip 1290Badge 996 (28 yrs exp)Median 1.2 min late
Trip 1295Badge 2606 (4 yrs exp)Median 0.9 min late
Two latedepartures
One late, oneearly arrival
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0.0
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8:30 8:45 9:00 9:15 9:30
Time
D i s t a n c e
( m i l e s
)
0
5
10
15
20
25
30
35
40
45
50
Ap r i l 1 : I m p act o fAp r i l 1 : I m p act o f PaxPax LoadLoad
Tr i p 1 2 9 0Load
P a s s e n g e r
L o
a d
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OnOn -- t i m e Per f o r m an cet i m e Per f o r m an ce
0
500
1,000
1,500
2,000
2,500
3,000
3,500
4,000
4,500
5,000
- 8 - 7 - 6 - 5 - 4 - 3 - 2 - 1 0 1 2 3 4 5 6 7 8 9 1 0
1 1
1 2
1 3
1 4
1 5
1 6
1 7
1 8
1 9
2 0
Late/Early (minutes)
F r e q u e n c y
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
All "stops"n = 66,012Median = 0.6 min Late
32% Early
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OnOn -- t i m e Per f o r m an cet i m e Per f o r m an ce
0
500
1,000
1,500
2,000
2,500
3,000
3,500
4,000
4,500
5,000
- 8 - 7 - 6 - 5 - 4 - 3 - 2 - 1 0 1 2 3 4 5 6 7 8 9 1 0
1 1
1 2
1 3
1 4
1 5
1 6
1 7
1 8
1 9
2 0
Late/Early (minutes)
F r e q u e n c y
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
TriMet Service Standard
[-1 min +5 min]85% On-time11% Early4% Late
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OTP v s . Tim e of DayOTP v s . Tim e of Day
-30
-20
-10
0
10
20
30
5:00 7:00 9:00 11:00 13:00 15:00 17:00 19:00 21:00 23:00
Time
E a r l y
/ L a
t e ( m i n u
t e s
)
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Tr iMetTr iMet Op e r a t o r Ex p e r i en ceOp e r a t o r Ex p e r i en ce
0
100
200
300
400
500
0 4 8 12 16 20 24 28 32 36 40
F r e q u e n c y
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%n = 3,249Mean = 9.8 years
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Tr iMetTr iMet Ope r a t o r OTPOper a t o r OTP
-3
-2
-1
0
1
2
3
4
5
6
1
Operator
M e d i a n
L a
t e / E a r
l y
April 1-12, 2002
Route 14 Inbound94 Operators65,848 stops
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Tr iMetTr iMet Ope r a t o r OTPOper a t o r OTP
-3
-2
-1
0
1
2
3
4
5
6
0 5 10 15 20 25 30
Years Experience
M e
d i a n
E a r l y / L a
t e
April 1-12, 2002Route 14 Inbound
94 Operators65,848 stops
LateEarly
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St o p Le v e l Pe r f o r m a n ceSt o p Le v e l Pe r f o r m a n ce
0:00
0:05
0:10
0:15
0:20
0:25
0:30
0:00 0:05 0:10 0:15 0:20 0:25 0:30Actual Headway
S c
h e
d u
l e d H e a d w a y
April 1, 2002
Stop No. 2606
Hawthorne/ 22nd Ave
Mean Headway 11:02 min
St. Dev. 7:10
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St o p Le v e l Pe r f o r m a n ceSt o p Le v e l Pe r f o r m a n ce
April 1, 2002
Stop No. 2606
Hawthorne/SE 22nd Ave
Mean Headway 11:02 min
St. Dev. 7:100
5
10
15
20
25
30
35
40
45
50
5:00 6:00 7:00 8:00 9:00 10:00 11:00 12:00
Time
C u m u
l a t i v e
B u s
A r r i v a
l N u m
b e r
ScheduledActual
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Ro u t e 1 4 : Tr i p Ti m e Mo d e lRo u t e 1 4 : Tr i p Ti m e Mo d e l
boardingpassengersalightingpassengers
dwellsofnumbertimetripnonstopaverage0
0
=
=
=
=
+++=
b
a
d
b a d
N
N
N
T
cN bN aN T T
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Dw el l Ti m eDw el l Ti m e
0
1,000
2,000
3,000
4,000
5,000
6,000
7,000
0 1 0
2 0
3 0
4 0
5 0
6 0
7 0
8 0
9 0
1 0 0
Dwell (sec)
F r e q u e n c y
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100
Nonzero Dwellsn = 34,456Mean = 13.3 sSD = 20.3 sLift use = 232 times
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D w el l Ti m e v s . Pa ssen g e r M o v e m en tD w el l Ti m e v s . Pa ssen g e r M o v e m e n t
0
20
40
60
80
100
120
140
160
180
200
0 5 10 15 20 25 30 35 40 45
Passenger Movement
D w e
l l T i m e ( s
e c
)Off
28%
On61%
On + Off
4%
None
7%
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B o a r d i n g sB o a r d i n g s
0
2,000
4,000
6,000
8,000
10,000
12,000
0 1 2 3 4 5 6 7 8 9 1 0
1 1
1 2
1 3
1 4
1 5
1 6
1 7
1 8
1 9
2 0
Boardings
F r e q u e n c y
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
n = 37,441Mean = 1.33SD = 2.45Max = 37
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A l i g h t i n g sA l i g h t i n g s
0
2,000
4,000
6,000
8,000
10,000
12,000
14,000
16,000
0 1 2 3 4 5 6 7 8 9 1 0
1 1
1 2
1 3
1 4
1 5
1 6
1 7
1 8
1 9
2 0
Alightings
F r e q u e n c y
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%n = 36,978Mean = 1.31SD = 2.62Max = 37
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Dw el l Ti m e M o d elDw el l Ti m e M o d el
021,795.063.6Dwell:OnlyAlighting
357,1527.403.6Dwell:OnlyBoarding
layover]no,G""APClift,nozero,-[non995,2496.087.294.5TimeDwell
=
+=
=
+=
==
++=
n
N
n
N
n
N N
a
b
a b
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0
200
400
600
800
1,000
1,200
1,400
1,600
1,800
2,000
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
Link Distance (miles)
T r a v e
l T i m e
( s e c
)
N o n st o p Tr i p Ti m eN o n st o p Tr i p Ti m e
n = 30,036 links
NSTT=15.3+191.2 x (sec)
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Tr i p Ti m e M o d e lTr i p Ti m e Mo d e l
boardingpassengers
alightingpassengersdwellsofnumber
87.296.02.211606
=
=
=
+++=
b
a
d
b a d
N
N N
N N N T
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Ru n Ti m e s: A p r i l 1Ru n Ti m e s: Ap r i l 1 -- 1 2 , 2 0 0 21 2 , 2 0 0 2
0
10
20
30
40
50
60
70
6:00 8:00 10:00 12:00 14:00 16:00 18:00 20:00 22:00 0:00
Arrive Time
R u n
T i m e
( m
i n )
n =856 tripsMean on=40/tripMean off=40/tripMean no. of dwells=35/trip
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Ru n Ti m e s: A p r i l 1Ru n Ti m e s: Ap r i l 1 -- 1 2 , 2 0 0 21 2 , 2 0 0 2
0
10
20
30
40
50
60
70
80
90
100
2 6
2 8
3 0
3 2
3 4
3 6
3 8
4 0
4 2
4 4
4 6
4 8
5 0
5 2
5 4
5 6
5 8
6 0
Run Time (minutes)
F r e q u e n c y
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
n =856 tripsMean=41.5 minSD=5.1 min
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Ru n Ti m e v s . Op e r a t o r Ex p e r i en ceRu n Ti m e v s . Op e r a t o r Ex p e r i e n ce
0
10
20
30
40
50
60
1973 1976 1979 1982 1984 1987 1990 1993 1995 1998 2001
Hire Date
M e a n
R u n T
i m e
n =856 trips83 operatorsRun time/experience relationship (95% confidence)
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A ct u a l v s . Pr e d i ct e d Ru n Ti m eA ct u a l v s . Pr e d i ct e d Ru n Ti m e
20
25
30
35
40
45
50
55
60
20 30 40 50 60
Actual Run Time
P r e
d i c t e d R u n
T i m e
594592Veh-hrs7.4 min5.1 minSD
41.6 min41.5 minMean
P r e d i c t e dA c t u a ln =856
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St op Con so l id a t i on Ana ly si sSt op Con so l id a t i on Ana ly si s
Route 14 length 41710 feet, 64 stops
Mean stop spacing 670 feetConsolidate stops to 1000 foot spacingeliminate 10 stopsReduce trip time 21.2 sec per stop, save 3.5 min perinbound run105 inbound trips per day 6.1 hours savings ($60/hr +/-)Add ~9 trips using existing resourcesImprove mean headway 11.4 10.4 min
Does it affect demand?
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Bo ar d i n g Ar e a I m p r o v em en t An a ly s i sBo ar d i n g A r ea I m p r o v em en t An a ly si sStreamlining program to reduce dwelltime
Curb extensionsNearside farside conversionSmart cards
Mean boarding time estimated 2.87 secReduce boarding time by 1 sec at top tenlocationsTotal of 1800 passengers boarded atthese locationsSave 30 min/day
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Ot h e r Ap p l i ca t i o n sOt h er A p p l i ca t i o n s
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Ot h e r Ap p l i ca t i o n sOt h er A p p l i ca t i o n s
1 censustract
0.25-mibuffers
38% of population
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Tr a n s i t Si g n a l Pr i o r i t yTr a n s i t Si g n a l Pr i o r i t y
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Tr a n s i t Si g n a l Pr i o r i t yTr a n s i t Si g n a l Pr i o r i t y
Reduce run time and schedule variability180 intersections complete, 100 more in 2003Emitter turned on if bus is >90 sec late
Remains on until
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Tr a n s i t Si g n a l Pr i o r i t yTr a n s i t Si g n a l Pr i o r i t y
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Ex p r ess Bu ses a s Fr eew ay Pr ob esEx pr ess Bu ses a s Fr eew ay Pr ob es
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Bu ses a s Pr ob es on Ar t e r i a l sBu ses a s Pr ob es on Ar t e r i a l s
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Bu ses a s Pr ob es on Ar t e r i a l sBu ses a s Pr ob es on Ar t e r i a l s
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Bu ses a s Pr ob es on Ar t e r i a l sBu ses a s Pr ob es on Ar t e r i a l s
b l
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Bu ses a s Pr ob es on Ar t e r i a l sBu ses a s Pr ob es on Ar t e r i a l s
b lB P b A i l
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Bu ses a s Pr ob es on Ar t e r i a l sBu ses a s Pr ob es on Ar t e r i a l s
B P b A i lB P b A i l
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Bu ses a s Pr ob es on Ar t e r i a l sBu ses a s Pr ob es on Ar t e r i a l s
B P b A i lB P b A t i l
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Bu ses a s Pr ob es on Ar t e r i a l sBu ses a s Pr ob es on Ar t e r i a l s
Vveh = 0.84 V pseudo
tt veh = 1.23 tt pseudo
B P b A t i lB P b A t i l
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Bu ses a s Pr ob es on Ar t e r i a l sBu ses a s Pr ob es on Ar t e r i a l s
B i r d s d a l e
A v e
.
T o w
l e A v e
.
E a s t m a n
P k w y .
M a i n
A v e
.
W a l
t e r s
R d .
C l e v e
l a n d
A v e
.
H o o
d A v e
.
H o g a n
A v e
.
TriMetRoute 9
Probe Vehicle Run
Signalized IntersectionBus Stop
Legend
B P b A t i lBu ses a s Pr ob es on Ar t e r i a l s
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Bu ses a s Pr ob es on Ar t e r i a l sBu ses a s Pr ob es on Ar t e r i a l s
Before (sec) 172 200 168 178 212 142
After (sec) 169 182 131 130 224 122
EB Probe EB Bus EB Hypothetical WB Probe WB Bus WB Hypothetical
EASTBOUND WESTBOUND
2% Savings
9% Savings
-6% Savings
14% Savings
27% Savings22% Savings
Discuss ionDiscuss ion
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Discuss ionDiscuss ion
Other uses for the BDS data?Conclusions?Save all of your data!
Ask for archiving capabilities
A c k n o w l e d g e m e n t sA c k n o w l e d g e m e n t s
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A c k n o w l e d g e m e n t sA c k n o w l e d g e m e n t s
Steve Callas, TriMet
Ahmed El-Geneidy, JamesStrathman, Thomas Kimpel,Kenneth Dueker, Center forUrban StudiesSutti Tantiyanugulchai, Civil & Environmental EngineeringNational Science FoundationOregon Department of TransportationCity of PortlandFederal Transit Administration
Mo r e i n f o r m at i onMo r e i n f o r m at i on
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Mo r e i n f o r m at i onMo r e i n f o r m at i on
Email: [email protected]: http://www.its.pdx.eduTriMet data readily available.