{"id":"https://openalex.org/W2017559197","doi":"https://doi.org/10.1061/(asce)cp.1943-5487.0000310","title":"Real-Time Traffic Density Estimation without Reliable Side Road Data","display_name":"Real-Time Traffic Density Estimation without Reliable Side Road Data","publication_year":2013,"publication_date":"2013-04-12","ids":{"openalex":"https://openalex.org/W2017559197","doi":"https://doi.org/10.1061/(asce)cp.1943-5487.0000310","mag":"2017559197"},"language":"en","primary_location":{"id":"doi:10.1061/(asce)cp.1943-5487.0000310","is_oa":false,"landing_page_url":"https://doi.org/10.1061/(asce)cp.1943-5487.0000310","pdf_url":null,"source":{"id":"https://openalex.org/S176637136","display_name":"Journal of Computing in Civil Engineering","issn_l":"0887-3801","issn":["0887-3801","1943-5487"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310315747","host_organization_name":"American Society of Civil Engineers","host_organization_lineage":["https://openalex.org/P4310315747"],"host_organization_lineage_names":["American Society of Civil Engineers"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Journal of Computing in Civil Engineering","raw_type":"journal-article"},"type":"article","indexed_in":["crossref"],"open_access":{"is_oa":false,"oa_status":"closed","oa_url":null,"any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5003928848","display_name":"T. Ajitha","orcid":null},"institutions":[{"id":"https://openalex.org/I2800731441","display_name":"Government of Kerala","ror":"https://ror.org/00r96e843","country_code":"IN","type":"government","lineage":["https://openalex.org/I2800731441"]},{"id":"https://openalex.org/I52703040","display_name":"Kannur University","ror":"https://ror.org/00zz2cd87","country_code":"IN","type":"education","lineage":["https://openalex.org/I52703040"]}],"countries":["IN"],"is_corresponding":false,"raw_author_name":"T. Ajitha","raw_affiliation_strings":["Assistant Professor, Dept. of Civil Engineering, Government College of Engineering, Kannur 670 563, Kerala, India"],"affiliations":[{"raw_affiliation_string":"Assistant Professor, Dept. of Civil Engineering, Government College of Engineering, Kannur 670 563, Kerala, India","institution_ids":["https://openalex.org/I2800731441","https://openalex.org/I52703040"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5070390385","display_name":"Lelitha Vanajakshi","orcid":"https://orcid.org/0000-0002-1137-9656"},"institutions":[{"id":"https://openalex.org/I24676775","display_name":"Indian Institute of Technology Madras","ror":"https://ror.org/03v0r5n49","country_code":"IN","type":"facility","lineage":["https://openalex.org/I24676775"]}],"countries":["IN"],"is_corresponding":true,"raw_author_name":"L. Vanajakshi","raw_affiliation_strings":["Associate Professor, Dept. of Civil Engineering, Indian Institute of Technology Madras, Chennai 600 036, India (corresponding author)"],"affiliations":[{"raw_affiliation_string":"Associate Professor, Dept. of Civil Engineering, Indian Institute of Technology Madras, Chennai 600 036, India (corresponding author)","institution_ids":["https://openalex.org/I24676775"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5039918256","display_name":"Shankar C. Subramanian","orcid":"https://orcid.org/0000-0001-6710-2202"},"institutions":[{"id":"https://openalex.org/I24676775","display_name":"Indian Institute of Technology Madras","ror":"https://ror.org/03v0r5n49","country_code":"IN","type":"facility","lineage":["https://openalex.org/I24676775"]}],"countries":["IN"],"is_corresponding":false,"raw_author_name":"S. C. Subramanian","raw_affiliation_strings":["Associate Professor, Dept. of Engineering Design, Indian Institute of Technology Madras, Chennai 600 036, India"],"affiliations":[{"raw_affiliation_string":"Associate Professor, Dept. of Engineering Design, Indian Institute of Technology Madras, Chennai 600 036, India","institution_ids":["https://openalex.org/I24676775"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":3,"corresponding_author_ids":["https://openalex.org/A5070390385"],"corresponding_institution_ids":["https://openalex.org/I24676775"],"apc_list":null,"apc_paid":null,"fwci":1.0099,"has_fulltext":false,"cited_by_count":12,"citation_normalized_percentile":{"value":0.80176161,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":89,"max":97},"biblio":{"volume":"29","issue":"2","first_page":null,"last_page":null},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10524","display_name":"Traffic control and management","score":0.9998999834060669,"subfield":{"id":"https://openalex.org/subfields/2207","display_name":"Control and Systems Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T10524","display_name":"Traffic control and management","score":0.9998999834060669,"subfield":{"id":"https://openalex.org/subfields/2207","display_name":"Control and Systems Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T11344","display_name":"Traffic Prediction and Management Techniques","score":0.9998000264167786,"subfield":{"id":"https://openalex.org/subfields/2215","display_name":"Building and Construction"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10698","display_name":"Transportation Planning and Optimization","score":0.9980000257492065,"subfield":{"id":"https://openalex.org/subfields/3313","display_name":"Transportation"},"field":{"id":"https://openalex.org/fields/33","display_name":"Social Sciences"},"domain":{"id":"https://openalex.org/domains/2","display_name":"Social Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/estimation","display_name":"Estimation","score":0.560636043548584},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.5109135508537292},{"id":"https://openalex.org/keywords/road-traffic","display_name":"Road traffic","score":0.4781278669834137},{"id":"https://openalex.org/keywords/transport-engineering","display_name":"Transport engineering","score":0.47634294629096985},{"id":"https://openalex.org/keywords/density-estimation","display_name":"Density estimation","score":0.45675405859947205},{"id":"https://openalex.org/keywords/engineering","display_name":"Engineering","score":0.29679158329963684},{"id":"https://openalex.org/keywords/statistics","display_name":"Statistics","score":0.22207990288734436},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.14340555667877197},{"id":"https://openalex.org/keywords/estimator","display_name":"Estimator","score":0.1075192391872406}],"concepts":[{"id":"https://openalex.org/C96250715","wikidata":"https://www.wikidata.org/wiki/Q965330","display_name":"Estimation","level":2,"score":0.560636043548584},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.5109135508537292},{"id":"https://openalex.org/C2985695025","wikidata":"https://www.wikidata.org/wiki/Q4323994","display_name":"Road traffic","level":2,"score":0.4781278669834137},{"id":"https://openalex.org/C22212356","wikidata":"https://www.wikidata.org/wiki/Q775325","display_name":"Transport engineering","level":1,"score":0.47634294629096985},{"id":"https://openalex.org/C189508267","wikidata":"https://www.wikidata.org/wiki/Q17088227","display_name":"Density estimation","level":3,"score":0.45675405859947205},{"id":"https://openalex.org/C127413603","wikidata":"https://www.wikidata.org/wiki/Q11023","display_name":"Engineering","level":0,"score":0.29679158329963684},{"id":"https://openalex.org/C105795698","wikidata":"https://www.wikidata.org/wiki/Q12483","display_name":"Statistics","level":1,"score":0.22207990288734436},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.14340555667877197},{"id":"https://openalex.org/C185429906","wikidata":"https://www.wikidata.org/wiki/Q1130160","display_name":"Estimator","level":2,"score":0.1075192391872406},{"id":"https://openalex.org/C201995342","wikidata":"https://www.wikidata.org/wiki/Q682496","display_name":"Systems engineering","level":1,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1061/(asce)cp.1943-5487.0000310","is_oa":false,"landing_page_url":"https://doi.org/10.1061/(asce)cp.1943-5487.0000310","pdf_url":null,"source":{"id":"https://openalex.org/S176637136","display_name":"Journal of Computing in Civil Engineering","issn_l":"0887-3801","issn":["0887-3801","1943-5487"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310315747","host_organization_name":"American Society of Civil Engineers","host_organization_lineage":["https://openalex.org/P4310315747"],"host_organization_lineage_names":["American Society of Civil Engineers"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Journal of Computing in Civil Engineering","raw_type":"journal-article"}],"best_oa_location":null,"sustainable_development_goals":[{"score":0.6899999976158142,"id":"https://metadata.un.org/sdg/11","display_name":"Sustainable cities and communities"}],"awards":[],"funders":[{"id":"https://openalex.org/F4320320738","display_name":"Indo-US Science and Technology Forum","ror":"https://ror.org/03sw64e71"}],"has_content":{"grobid_xml":false,"pdf":false},"content_urls":null,"referenced_works_count":45,"referenced_works":["https://openalex.org/W32452329","https://openalex.org/W63101075","https://openalex.org/W562692826","https://openalex.org/W567156263","https://openalex.org/W612685003","https://openalex.org/W622204388","https://openalex.org/W794293433","https://openalex.org/W1559536185","https://openalex.org/W1965650507","https://openalex.org/W1981277868","https://openalex.org/W1987942756","https://openalex.org/W1989366486","https://openalex.org/W1992575402","https://openalex.org/W1999342954","https://openalex.org/W2008097967","https://openalex.org/W2011504567","https://openalex.org/W2011683780","https://openalex.org/W2016025229","https://openalex.org/W2028649492","https://openalex.org/W2032137277","https://openalex.org/W2032549372","https://openalex.org/W2037141248","https://openalex.org/W2055374326","https://openalex.org/W2064280355","https://openalex.org/W2072429305","https://openalex.org/W2084116159","https://openalex.org/W2084857974","https://openalex.org/W2090192376","https://openalex.org/W2093921901","https://openalex.org/W2095797625","https://openalex.org/W2097127615","https://openalex.org/W2100641602","https://openalex.org/W2105934661","https://openalex.org/W2108199400","https://openalex.org/W2111018498","https://openalex.org/W2111204826","https://openalex.org/W2125662691","https://openalex.org/W2147779137","https://openalex.org/W2149660853","https://openalex.org/W2153154015","https://openalex.org/W2244242282","https://openalex.org/W3023086055","https://openalex.org/W4301197150","https://openalex.org/W6622750105","https://openalex.org/W6690728138"],"related_works":["https://openalex.org/W2748952813","https://openalex.org/W2390279801","https://openalex.org/W2358668433","https://openalex.org/W2376932109","https://openalex.org/W2001405890","https://openalex.org/W2382290278","https://openalex.org/W2478288626","https://openalex.org/W2377430935","https://openalex.org/W2055973554","https://openalex.org/W2917961983"],"abstract_inverted_index":{"One":[0],"of":[1,66,70,78,84,121,128,187],"the":[2,19,76,97,119,126,132,161,174,177,180,184,191,211],"most":[3],"popular":[4],"intelligent":[5],"transportation":[6],"systems":[7],"(ITS)":[8],"applications":[9],"is":[10,23,32,35,61,75,95],"to":[11,18,109,215],"provide":[12],"real-time":[13],"road":[14,206],"traffic":[15,56,60,67,106,123,142],"congestion":[16,26],"information":[17],"users.":[20],"Traffic":[21],"density":[22,50,124],"a":[24,88,152,205],"major":[25],"indicator,":[27],"and":[28,54,68,148,183,193,210],"because":[29],"its":[30,64],"measurement":[31,83],"difficult,":[33],"it":[34],"usually":[36],"estimated":[37],"from":[38,204],"other":[39],"readily":[40],"measurable":[41],"parameters.":[42],"Several":[43],"studies":[44],"have":[45],"explored":[46],"various":[47],"approaches":[48],"for":[49,52,169],"estimation":[51,154],"homogeneous":[53],"lane-disciplined":[55],"conditions.":[57],"However,":[58],"Indian":[59,136],"different":[62],"with":[63,105],"heterogeneity":[65],"absence":[69,127],"lane":[71],"discipline.":[72],"Another":[73],"characteristic":[74],"lack":[77],"access":[79],"control,":[80],"making":[81],"automated":[82,129],"net":[85],"entry":[86,181,192],"into":[87],"study":[89,116],"section":[90],"difficult.":[91],"An":[92],"added":[93],"difficulty":[94],"that":[96],"roads":[98],"in":[99,111,125,173,208],"India":[100],"are":[101,176],"not":[102],"yet":[103],"equipped":[104],"sensors,":[107],"leading":[108],"limitation":[110],"data":[112,167,202],"collection.":[113],"The":[114,165,196],"present":[115],"mainly":[117],"addresses":[118],"issue":[120],"estimating":[122],"sensors":[130],"at":[131],"side":[133],"roads/ramps":[134],"on":[135,160],"roadways.":[137],"A":[138],"lumped":[139],"parameter":[140],"macroscopic":[141],"flow":[143,178],"model":[144],"has":[145,156],"been":[146,157],"formulated,":[147],"using":[149,201],"this":[150,171],"model,":[151],"model-based":[153],"scheme":[155],"designed":[158],"based":[159],"Kalman":[162],"filtering":[163],"technique.":[164],"only":[166],"required":[168],"implementing":[170],"method":[172,198],"field":[175],"passing":[179,189],"location":[182],"spot":[185],"speeds":[186],"vehicles":[188],"through":[190],"exit":[194],"locations.":[195],"proposed":[197],"was":[199,213],"corroborated":[200],"measured":[203],"stretch":[207],"Chennai,":[209],"performance":[212],"found":[214],"be":[216],"satisfactory.":[217]},"counts_by_year":[{"year":2022,"cited_by_count":3},{"year":2021,"cited_by_count":2},{"year":2020,"cited_by_count":1},{"year":2019,"cited_by_count":2},{"year":2017,"cited_by_count":2},{"year":2015,"cited_by_count":1},{"year":2014,"cited_by_count":1}],"updated_date":"2025-11-06T03:46:38.306776","created_date":"2025-10-10T00:00:00"}
