WLTP-EU DB short trip analyis
H.S.
Overview of the WLTP-EU database short trip
analysis
by H. Steven
30.09.2014
1
Categorisation of the Database
H.S.
•
The WLTP in-use database contains second by second
data from Europe, India, Japan, Korea and US.
•
For the analysis the WLTP in-use data was divided into
short trips and stop phases.
•
Stop phases are time periods with vehicle speeds < 1
km/h, a short trip is a time period with v >= 1 km/h
between two consecutive stops.
•
A further segmentation of the data was done with
respect to the max. speed of a short trip:
 Low phase: v_max <= 60 km/h,
 Medium phase: 60 km/h < v_max <= 80 km/h,
 High phase: 80 km/h < v_max <= 110 km/h,
 Extra high phase: v_max > 110 km/h.
2
Categorisation of the Database
H.S.
•
This schema was chosen in order to ease the
comparability of in-use data from different regions of
the world (India, Japan, Korea, US)
•
This presentation focusses on the European part of
the database.
•
The EU part of the WLTP in-use database contains data
from the following member states:
 Belgium, France, Germany, Italy, Poland, France,
Slovenia, Spain, Sweden, UK.
•
Within the short trips the following driving condition
phases were differentiated:
3
Categorisation of the Database
•
H.S.
 Acceleration (acc): a > 0,278 m/s²,
 Cruise : -0,278 m/s² <= a <= 0,278 m/s²,
 Deceleration (dec): a < -0,278 m/s²
Table 1 shows an overview of the results:
phase
acc
cruise
dec
acc
cruise
dec
phase
acc
cruise
dec
low
15,825
31,859
16,930
64,615
14.8%
low
24.5%
49.3%
26.2%
low
33.7
28.4
30.7
mileage in km
medium
high
extra high
13,611
18,517
23,388
36,432
71,239
151,030
13,876
18,851
23,979
63,918
108,607
198,396
14.7%
24.9%
45.6%
medium
high
extra high
21.3%
17.0%
11.8%
57.0%
65.6%
76.1%
21.7%
17.4%
12.1%
number of phases per km
medium
high
extra high
18.3
14.2
9.9
12.1
6.8
2.9
17.1
13.4
9.6
all
71,340
290,560
73,636
435,537
all
16.4%
66.7%
16.9%
all
4
Short trip duration distribution
H.S.
•
The following figures show the duration and distance
distributions of the short trips for the four speed
classes, number and distance or time weighted.
•
The major part of the short trips in the low speed class
is shorter than 2 min. And even for the extra high
speed part 50% of the short trips are below 13 min.
•
The distance weighting changes this situation to
longer durations: The short trips below 13 min in extra
high represent less than 20% of the total mileage.
5
H.S.
Short trip duration distribution
100%
90%
80%
cum frequency
70%
60%
50%
WLTP EU database, short trips
40%
30%
low, number
medium, number
20%
high, number
10%
extra high, number
0%
0
200
400
600
800
1000
1200
1400
duration in s
1600
1800
2000
2200
Figure 1
2400
6
H.S.
Short trip duration distribution
100%
90%
80%
WLTP EU database, short trips
cum frequency
70%
60%
50%
40%
30%
low, distance weighted
medium, distance weighted
20%
high, distance weighted
10%
extra high, distance weighted
0%
0
200
400
600
800
1000
1200
1400
duration in s
1600
1800
2000
2200
Figure 2
2400
7
H.S.
Short trip distance distribution
100%
90%
80%
cum frequency
70%
60%
low, number
medium, number
50%
high, number
40%
extra high, number
30%
20%
WLTP EU database, short trips
10%
0%
0
5,000
10,000
15,000
20,000 25,000 30,000
ST distance in m
35,000
40,000
45,000
Figure 3
50,000
8
H.S.
Short trip distance distribution
100%
90%
80%
WLTP EU database, short trips
cum frequency
70%
60%
50%
40%
30%
low, time weighted
20%
medium, time weighted
high, time weighted
10%
extra high, time weighted
0%
0
5,000
10,000
15,000
20,000 25,000 30,000
ST distance in m
35,000
40,000
45,000
Figure 4
50,000
9
Driving condition distributions
H.S.
•
Table 2 shows the duration distributions of the
acceleration phases for the short trips of the four
speed classes.
•
All phases have durations below 1 min.
•
Figure 5 shows the duration distributions of the cruise
phases for the short trips of the four speed classes.
•
These phases are significantly longer than the others.
•
Table 3 shows the duration distributions of the
deceleration phases for the short trips of the four
speed classes.
•
The durations of the deceleration phases tend to be a
bit longer than the acceleration phases, but the
differences are very low.
10
Categorisation of the Database
ST class
low
33.7
ST class
medium
18.3
ST class
high
14.2
ST class
extra high
9.9
duration in s
2.5
10
20
30
duration in s
2.5
10
20
30
40
duration in s
2.5
10
20
30
40
duration in s
2.5
10
20
30
40
50
number
309,598
216,612
6,763
7
532,980
number
133,057
105,012
10,392
164
1
248,626
number
148,180
102,179
11,771
761
20
262,911
number
140,224
81,199
9,423
1,392
170
23
232,431
Acceleration phases
sdist in m v_ave in km/h
4,517,256
20.5
10,450,322
22.7
855,997
27.8
1,496
30.1
15,825,070
sdist in m v_ave in km/h
3,523,655
39.9
8,201,598
35.5
1,837,311
37.0
47,739
39.8
421
43.3
13,610,725
sdist in m v_ave in km/h
5,073,431
52.1
10,337,534
46.9
2,784,363
48.1
309,620
53.6
11,841
57.6
18,516,790
sdist in m v_ave in km/h
7,207,463
80.8
12,038,303
69.8
3,196,317
67.7
785,715
72.6
136,293
76.6
23,465
76.7
23387556.4
H.S.
number
w_distance
58.1%
28.5%
40.6%
66.0%
1.3%
5.4%
0.0%
0.0%
number
w_distance
53.5%
25.9%
42.2%
60.3%
4.2%
13.5%
0.1%
0.4%
0.0%
0.0%
number
w_distance
56.4%
27.4%
38.9%
55.8%
4.5%
15.0%
0.3%
1.7%
0.0%
0.1%
number
w_distance
60.3%
30.8%
34.9%
51.5%
4.1%
13.7%
0.6%
3.4%
0.1%
0.6%
0.0%
0.1%
100.0%
100.0%
Table 2
11
H.S.
Short trip distance distribution
100%
90%
80%
WLTP EU database, cruise sections,
(-0.278 m/s² < a < 0.278 m/s²),
distance weighted
cum frequency
70%
60%
low
medium
high
extra high
50%
40%
30%
20%
10%
0%
0
100
200
300
duration in s
400
500
Figure 5
600
12
Categorisation of the Database
ST class
low
30.7
ST class
medium
17.1
ST class
high
13.4
ST class
extra high
9.6
duration in s
2.5
10
20
30
duration in s
2.5
10
20
30
40
duration in s
2.5
10
20
30
40
50
duration in s
2.5
10
20
30
40
50
60
number
282,613
227,939
8,606
45
519,203
number
123,547
103,178
9,856
276
4
236,861
number
141,010
100,411
10,583
866
47
1
252,918
number
138,535
80,017
8,774
1,525
261
31
4
229,147
Deceleration phases
sdist in m v_ave in km/h
4,421,006
22.1
11,399,111
23.7
1,100,174
27.6
10,168
30.9
16,930,459
sdist in m v_ave in km/h
3,412,280
41.7
8,567,191
38.2
1,813,176
38.2
81,165
39.9
1,742
43.6
13,875,553
sdist in m v_ave in km/h
5,084,088
54.5
10,665,093
49.7
2,711,132
51.7
362,060
54.7
27,769
57.1
820
62.8
18,850,961
sdist in m v_ave in km/h
7,568,006
85.3
12,239,824
73.3
3,061,757
69.5
874,319
73.1
201,312
73.4
29,644
72.1
4,337
67.6
23,979,200
H.S.
number
w_distance
54.4%
26.1%
43.9%
67.3%
1.7%
6.5%
0.0%
0.1%
number
w_distance
52.2%
24.6%
43.6%
61.7%
4.2%
13.1%
0.1%
0.6%
0.0%
0.0%
number
w_distance
55.8%
27.0%
39.7%
56.6%
4.2%
14.4%
0.3%
1.9%
0.0%
0.1%
0.0%
0.0%
number
w_distance
60.5%
31.6%
34.9%
51.0%
3.8%
12.8%
0.7%
3.6%
0.1%
0.8%
0.0%
0.1%
0.0%
0.0%
Table 3
13
End of presentation
H.S.
Thank you for your attention!
14