Transportation Research Part C: Emerging Technologies

The focus of Transportation Research: Part C is high-quality, scholarly research that addresses development, applications, and implications, in the field of transportation, of emerging technologies from such fields as operations research, computer science, electronics, control systems, artificial intelligence, and telecommunications, among others. The interest is not in the individual technologies or methodologies per se, but in their ultimate implications for the planning, design, operation, control, management, maintenance and rehabilitation of transportation systems, services and components. Of particular interest are the impacts of emerging technologies on transportation system performance, in terms of level of service, capacity, safety, reliability, resource consumption and the environment, economics and finance, privacy, standards, and liability. Submissions in the following areas of transportation are encouraged by Part C: the impact of emerging technologies for all modes and for intermodal transportation; intelligent transportation systems; real-time operations; logistics; resource management; consumer/traveler adoption, acceptance and usage of new technologies; infrastructure applications of emerging technologies.

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Quartiles

The set of journals have been ranked according to their SJR and divided into four equal groups, four quartiles. Q1 (green) comprises the quarter of the journals with the highest values, Q2 (yellow) the second highest values, Q3 (orange) the third highest values and Q4 (red) the lowest values.

Category	Year	Quartile
Automotive Engineering	1999	Q1
Automotive Engineering	2000	Q1
Automotive Engineering	2001	Q1
Automotive Engineering	2002	Q1
Automotive Engineering	2003	Q1
Automotive Engineering	2004	Q1
Automotive Engineering	2005	Q1
Automotive Engineering	2006	Q1
Automotive Engineering	2007	Q1
Automotive Engineering	2008	Q1
Automotive Engineering	2009	Q1
Automotive Engineering	2010	Q1
Automotive Engineering	2011	Q1
Automotive Engineering	2012	Q1
Automotive Engineering	2013	Q1
Automotive Engineering	2014	Q1
Automotive Engineering	2015	Q1
Automotive Engineering	2016	Q1
Automotive Engineering	2017	Q1
Automotive Engineering	2018	Q1
Automotive Engineering	2019	Q1
Automotive Engineering	2020	Q1
Automotive Engineering	2021	Q1
Civil and Structural Engineering	1999	Q2
Civil and Structural Engineering	2000	Q2
Civil and Structural Engineering	2001	Q2
Civil and Structural Engineering	2002	Q1
Civil and Structural Engineering	2003	Q1
Civil and Structural Engineering	2004	Q1
Civil and Structural Engineering	2005	Q1
Civil and Structural Engineering	2006	Q1
Civil and Structural Engineering	2007	Q1
Civil and Structural Engineering	2008	Q1
Civil and Structural Engineering	2009	Q1
Civil and Structural Engineering	2010	Q1
Civil and Structural Engineering	2011	Q1
Civil and Structural Engineering	2012	Q1
Civil and Structural Engineering	2013	Q1
Civil and Structural Engineering	2014	Q1
Civil and Structural Engineering	2015	Q1
Civil and Structural Engineering	2016	Q1
Civil and Structural Engineering	2017	Q1
Civil and Structural Engineering	2018	Q1
Civil and Structural Engineering	2019	Q1
Civil and Structural Engineering	2020	Q1
Civil and Structural Engineering	2021	Q1
Computer Science Applications	1999	Q2
Computer Science Applications	2000	Q2
Computer Science Applications	2001	Q2
Computer Science Applications	2002	Q2
Computer Science Applications	2003	Q2
Computer Science Applications	2004	Q1
Computer Science Applications	2005	Q1
Computer Science Applications	2006	Q1
Computer Science Applications	2007	Q1
Computer Science Applications	2008	Q1
Computer Science Applications	2009	Q1
Computer Science Applications	2010	Q1
Computer Science Applications	2011	Q1
Computer Science Applications	2012	Q1
Computer Science Applications	2013	Q1
Computer Science Applications	2014	Q1
Computer Science Applications	2015	Q1
Computer Science Applications	2016	Q1
Computer Science Applications	2017	Q1
Computer Science Applications	2018	Q1
Computer Science Applications	2019	Q1
Computer Science Applications	2020	Q1
Computer Science Applications	2021	Q1
Management Science and Operations Research	1999	Q2
Management Science and Operations Research	2000	Q2
Management Science and Operations Research	2001	Q2
Management Science and Operations Research	2002	Q2
Management Science and Operations Research	2003	Q2
Management Science and Operations Research	2004	Q1
Management Science and Operations Research	2005	Q1
Management Science and Operations Research	2006	Q1
Management Science and Operations Research	2007	Q2
Management Science and Operations Research	2008	Q2
Management Science and Operations Research	2009	Q2
Management Science and Operations Research	2010	Q2
Management Science and Operations Research	2011	Q1
Management Science and Operations Research	2012	Q1
Management Science and Operations Research	2013	Q1
Management Science and Operations Research	2014	Q1
Management Science and Operations Research	2015	Q1
Management Science and Operations Research	2016	Q1
Management Science and Operations Research	2017	Q1
Management Science and Operations Research	2018	Q1
Management Science and Operations Research	2019	Q1
Management Science and Operations Research	2020	Q1
Management Science and Operations Research	2021	Q1
Transportation	1999	Q1
Transportation	2000	Q2
Transportation	2001	Q1
Transportation	2002	Q1
Transportation	2003	Q1
Transportation	2004	Q1
Transportation	2005	Q1
Transportation	2006	Q1
Transportation	2007	Q2
Transportation	2008	Q2
Transportation	2009	Q1
Transportation	2010	Q1
Transportation	2011	Q1
Transportation	2012	Q1
Transportation	2013	Q1
Transportation	2014	Q1
Transportation	2015	Q1
Transportation	2016	Q1
Transportation	2017	Q1
Transportation	2018	Q1
Transportation	2019	Q1
Transportation	2020	Q1
Transportation	2021	Q1

SJR

The SJR is a size-independent prestige indicator that ranks journals by their 'average prestige per article'. It is based on the idea that 'all citations are not created equal'. SJR is a measure of scientific influence of journals that accounts for both the number of citations received by a journal and the importance or prestige of the journals where such citations come from It measures the scientific influence of the average article in a journal, it expresses how central to the global scientific discussion an average article of the journal is.

Year	SJR
1999	0.512
2000	0.496
2001	0.577
2002	0.689
2003	0.840
2004	1.336
2005	1.490
2006	1.915
2007	0.901
2008	0.977
2009	1.088
2010	0.937
2011	1.420
2012	1.542
2013	1.851
2014	2.045
2015	2.026
2016	1.998
2017	2.293
2018	2.611
2019	3.342
2020	3.185
2021	3.211

Total Documents

Evolution of the number of published documents. All types of documents are considered, including citable and non citable documents.

Year	Documents
1999	19
2000	22
2001	24
2002	24
2003	23
2004	21
2005	25
2006	25
2007	24
2008	45
2009	49
2010	75
2011	101
2012	93
2013	227
2014	199
2015	270
2016	233
2017	240
2018	319
2019	277
2020	326
2021	423

Citations per document

This indicator counts the number of citations received by documents from a journal and divides them by the total number of documents published in that journal. The chart shows the evolution of the average number of times documents published in a journal in the past two, three and four years have been cited in the current year. The two years line is equivalent to journal impact factor ™ (Thomson Reuters) metric.

Cites per document	Year	Value
Cites / Doc. (4 years)	1999	0.757
Cites / Doc. (4 years)	2000	0.798
Cites / Doc. (4 years)	2001	1.000
Cites / Doc. (4 years)	2002	1.602
Cites / Doc. (4 years)	2003	1.955
Cites / Doc. (4 years)	2004	2.215
Cites / Doc. (4 years)	2005	2.348
Cites / Doc. (4 years)	2006	3.118
Cites / Doc. (4 years)	2007	2.234
Cites / Doc. (4 years)	2008	2.821
Cites / Doc. (4 years)	2009	3.580
Cites / Doc. (4 years)	2010	3.105
Cites / Doc. (4 years)	2011	3.575
Cites / Doc. (4 years)	2012	3.567
Cites / Doc. (4 years)	2013	4.755
Cites / Doc. (4 years)	2014	4.897
Cites / Doc. (4 years)	2015	5.269
Cites / Doc. (4 years)	2016	5.108
Cites / Doc. (4 years)	2017	5.847
Cites / Doc. (4 years)	2018	8.016
Cites / Doc. (4 years)	2019	9.137
Cites / Doc. (4 years)	2020	10.340
Cites / Doc. (4 years)	2021	11.000
Cites / Doc. (3 years)	1999	0.757
Cites / Doc. (3 years)	2000	0.781
Cites / Doc. (3 years)	2001	0.847
Cites / Doc. (3 years)	2002	1.462
Cites / Doc. (3 years)	2003	1.686
Cites / Doc. (3 years)	2004	1.972
Cites / Doc. (3 years)	2005	2.456
Cites / Doc. (3 years)	2006	2.261
Cites / Doc. (3 years)	2007	1.958
Cites / Doc. (3 years)	2008	2.716
Cites / Doc. (3 years)	2009	3.202
Cites / Doc. (3 years)	2010	2.966
Cites / Doc. (3 years)	2011	3.343
Cites / Doc. (3 years)	2012	3.409
Cites / Doc. (3 years)	2013	4.569
Cites / Doc. (3 years)	2014	4.805
Cites / Doc. (3 years)	2015	4.832
Cites / Doc. (3 years)	2016	4.932
Cites / Doc. (3 years)	2017	5.764
Cites / Doc. (3 years)	2018	7.585
Cites / Doc. (3 years)	2019	8.922
Cites / Doc. (3 years)	2020	9.992
Cites / Doc. (3 years)	2021	10.751
Cites / Doc. (2 years)	1999	0.533
Cites / Doc. (2 years)	2000	0.703
Cites / Doc. (2 years)	2001	0.610
Cites / Doc. (2 years)	2002	1.196
Cites / Doc. (2 years)	2003	1.625
Cites / Doc. (2 years)	2004	1.936
Cites / Doc. (2 years)	2005	1.545
Cites / Doc. (2 years)	2006	1.804
Cites / Doc. (2 years)	2007	1.860
Cites / Doc. (2 years)	2008	2.102
Cites / Doc. (2 years)	2009	3.014
Cites / Doc. (2 years)	2010	2.766
Cites / Doc. (2 years)	2011	3.000
Cites / Doc. (2 years)	2012	3.142
Cites / Doc. (2 years)	2013	4.521
Cites / Doc. (2 years)	2014	4.222
Cites / Doc. (2 years)	2015	4.606
Cites / Doc. (2 years)	2016	4.701
Cites / Doc. (2 years)	2017	5.125
Cites / Doc. (2 years)	2018	7.285
Cites / Doc. (2 years)	2019	8.215
Cites / Doc. (2 years)	2020	9.376
Cites / Doc. (2 years)	2021	9.690

Total Cites

Self-Cites

Evolution of the total number of citations and journal's self-citations received by a journal's published documents during the three previous years.
Journal Self-citation is defined as the number of citation from a journal citing article to articles published by the same journal.

Cites	Year	Value
Self Cites	1999	7
Self Cites	2000	3
Self Cites	2001	5
Self Cites	2002	3
Self Cites	2003	3
Self Cites	2004	3
Self Cites	2005	10
Self Cites	2006	9
Self Cites	2007	6
Self Cites	2008	6
Self Cites	2009	17
Self Cites	2010	16
Self Cites	2011	40
Self Cites	2012	42
Self Cites	2013	166
Self Cites	2014	299
Self Cites	2015	474
Self Cites	2016	568
Self Cites	2017	560
Self Cites	2018	1011
Self Cites	2019	936
Self Cites	2020	1071
Self Cites	2021	1170
Total Cites	1999	53
Total Cites	2000	50
Total Cites	2001	50
Total Cites	2002	95
Total Cites	2003	118
Total Cites	2004	140
Total Cites	2005	167
Total Cites	2006	156
Total Cites	2007	139
Total Cites	2008	201
Total Cites	2009	301
Total Cites	2010	350
Total Cites	2011	565
Total Cites	2012	767
Total Cites	2013	1229
Total Cites	2014	2023
Total Cites	2015	2508
Total Cites	2016	3433
Total Cites	2017	4046
Total Cites	2018	5636
Total Cites	2019	7066
Total Cites	2020	8353
Total Cites	2021	9912

External Cites per Doc

Cites per Doc

Evolution of the number of total citation per document and external citation per document (i.e. journal self-citations removed) received by a journal's published documents during the three previous years. External citations are calculated by subtracting the number of self-citations from the total number of citations received by the journal’s documents.

Cites	Year	Value
External Cites per document	1999	0.667
External Cites per document	2000	0.746
External Cites per document	2001	0.763
External Cites per document	2002	1.415
External Cites per document	2003	1.643
External Cites per document	2004	1.930
External Cites per document	2005	2.343
External Cites per document	2006	2.227
External Cites per document	2007	1.956
External Cites per document	2008	2.708
External Cites per document	2009	3.054
External Cites per document	2010	2.904
External Cites per document	2011	3.302
External Cites per document	2012	3.388
External Cites per document	2013	4.136
External Cites per document	2014	4.195
External Cites per document	2015	4.036
External Cites per document	2016	4.226
External Cites per document	2017	5.096
External Cites per document	2018	6.344
External Cites per document	2019	7.889
External Cites per document	2020	8.827
External Cites per document	2021	9.607
Cites per document	1999	0.757
Cites per document	2000	0.781
Cites per document	2001	0.847
Cites per document	2002	1.462
Cites per document	2003	1.686
Cites per document	2004	1.972
Cites per document	2005	2.456
Cites per document	2006	2.261
Cites per document	2007	1.958
Cites per document	2008	2.716
Cites per document	2009	3.202
Cites per document	2010	2.966
Cites per document	2011	3.343
Cites per document	2012	3.409
Cites per document	2013	4.569
Cites per document	2014	4.805
Cites per document	2015	4.832
Cites per document	2016	4.932
Cites per document	2017	5.764
Cites per document	2018	7.585
Cites per document	2019	8.922
Cites per document	2020	9.992
Cites per document	2021	10.751

% International Collaboration

International Collaboration accounts for the articles that have been produced by researchers from several countries. The chart shows the ratio of a journal's documents signed by researchers from more than one country; that is including more than one country address.

Year	International Collaboration
1999	15.79
2000	9.09
2001	16.67
2002	20.83
2003	21.74
2004	28.57
2005	20.00
2006	16.00
2007	16.67
2008	20.00
2009	16.33
2010	22.67
2011	24.75
2012	27.96
2013	30.40
2014	30.15
2015	35.19
2016	39.06
2017	38.33
2018	37.93
2019	46.21
2020	42.02
2021	43.03

Citable documents

Non-citable documents

Not every article in a journal is considered primary research and therefore "citable", this chart shows the ratio of a journal's articles including substantial research (research articles, conference papers and reviews) in three year windows vs. those documents other than research articles, reviews and conference papers.

Documents	Year	Value
Non-citable documents	1999	1
Non-citable documents	2000	1
Non-citable documents	2001	0
Non-citable documents	2002	0
Non-citable documents	2003	0
Non-citable documents	2004	0
Non-citable documents	2005	1
Non-citable documents	2006	3
Non-citable documents	2007	3
Non-citable documents	2008	2
Non-citable documents	2009	1
Non-citable documents	2010	3
Non-citable documents	2011	10
Non-citable documents	2012	11
Non-citable documents	2013	12
Non-citable documents	2014	10
Non-citable documents	2015	15
Non-citable documents	2016	18
Non-citable documents	2017	18
Non-citable documents	2018	14
Non-citable documents	2019	15
Non-citable documents	2020	11
Non-citable documents	2021	12
Citable documents	1999	69
Citable documents	2000	63
Citable documents	2001	59
Citable documents	2002	65
Citable documents	2003	70
Citable documents	2004	71
Citable documents	2005	67
Citable documents	2006	66
Citable documents	2007	68
Citable documents	2008	72
Citable documents	2009	93
Citable documents	2010	115
Citable documents	2011	159
Citable documents	2012	214
Citable documents	2013	257
Citable documents	2014	411
Citable documents	2015	504
Citable documents	2016	678
Citable documents	2017	684
Citable documents	2018	729
Citable documents	2019	777
Citable documents	2020	825
Citable documents	2021	910

Cited documents

Uncited documents

Ratio of a journal's items, grouped in three years windows, that have been cited at least once vs. those not cited during the following year.

Documents	Year	Value
Uncited documents	1999	40
Uncited documents	2000	31
Uncited documents	2001	34
Uncited documents	2002	25
Uncited documents	2003	23
Uncited documents	2004	21
Uncited documents	2005	13
Uncited documents	2006	16
Uncited documents	2007	20
Uncited documents	2008	19
Uncited documents	2009	19
Uncited documents	2010	27
Uncited documents	2011	34
Uncited documents	2012	46
Uncited documents	2013	31
Uncited documents	2014	51
Uncited documents	2015	53
Uncited documents	2016	87
Uncited documents	2017	68
Uncited documents	2018	42
Uncited documents	2019	41
Uncited documents	2020	37
Uncited documents	2021	35
Cited documents	1999	30
Cited documents	2000	33
Cited documents	2001	25
Cited documents	2002	40
Cited documents	2003	47
Cited documents	2004	50
Cited documents	2005	55
Cited documents	2006	53
Cited documents	2007	51
Cited documents	2008	55
Cited documents	2009	75
Cited documents	2010	91
Cited documents	2011	135
Cited documents	2012	179
Cited documents	2013	238
Cited documents	2014	370
Cited documents	2015	466
Cited documents	2016	609
Cited documents	2017	634
Cited documents	2018	701
Cited documents	2019	751
Cited documents	2020	799
Cited documents	2021	887