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[{"key": "dc.contributor.advisor", "value": "Karvanen, Juha", "language": null, "element": "contributor", "qualifier": "advisor", "schema": "dc"}, {"key": "dc.contributor.author", "value": "Peltoluhta, Sara", "language": null, "element": "contributor", "qualifier": "author", "schema": "dc"}, {"key": "dc.date.accessioned", "value": "2025-06-23T10:26:58Z", "language": null, "element": "date", "qualifier": "accessioned", "schema": "dc"}, {"key": "dc.date.available", "value": "2025-06-23T10:26:58Z", "language": null, "element": "date", "qualifier": "available", "schema": "dc"}, {"key": "dc.date.issued", "value": "2025", "language": null, "element": "date", "qualifier": "issued", "schema": "dc"}, {"key": "dc.identifier.uri", "value": "https://jyx.jyu.fi/handle/123456789/103869", "language": null, "element": "identifier", "qualifier": "uri", "schema": "dc"}, {"key": "dc.description.abstract", "value": "T\u00e4m\u00e4n tutkielman tarkoituksena on selvitt\u00e4\u00e4 s\u00e4\u00e4n vaikutusta ajonopeuden jakaumaan Suomen valtateill\u00e4. Tarkastelun kohteena ovat henkil\u00f6- ja pakettiautojen ajonopeudet 15 eri mittauspisteess\u00e4. Ajonopeuksia mallinnetaan kvantiiliregressiota k\u00e4ytt\u00e4m\u00e4ll\u00e4.\nAineistona k\u00e4ytet\u00e4\u00e4n mittauspisteiss\u00e4 marraskuun 2023 ja lokakuun 2024 v\u00e4lisen\u00e4 aikana havaittuja ajoneuvoja. Aineisto muodostetaan yhdist\u00e4m\u00e4ll\u00e4 kaksi erillist\u00e4 aineistoa: liikenteen automaattiset mittaustiedot sek\u00e4 s\u00e4\u00e4havainnot mittauspistett\u00e4 l\u00e4himp\u00e4n\u00e4 olevalta s\u00e4\u00e4havaintoasemalta. Liikenteen automaattiset mittaustiedot sis\u00e4lt\u00e4v\u00e4t muun muassa mittauspisteen ohittaneiden ajoneuvojen ajonopeudet ja ajoneuvoluokat. S\u00e4\u00e4havainnot sis\u00e4lt\u00e4v\u00e4t tuntitasolla muodostettuja tietoja s\u00e4\u00e4st\u00e4, kuten l\u00e4mp\u00f6tilasta, sadem\u00e4\u00e4r\u00e4st\u00e4\n ja vallitsevasta s\u00e4\u00e4st\u00e4.\nJokaisen mittauspisteen aineistolle sovitetaan kvantiiliregressiomalli, jossa ajonopeutta selitet\u00e4\u00e4n vallitsevalla s\u00e4\u00e4ll\u00e4, l\u00e4mp\u00f6tilalla, tuulen nopeudella, sadem\u00e4\u00e4r\u00e4ll\u00e4, valoisuudella sek\u00e4 aikaerolla edelt\u00e4v\u00e4\u00e4n ajoneuvoon. Malli sovitetaan 19 eri kvantiilille, jolloin saadaan enemm\u00e4n tietoa selitt\u00e4jien vaikutuksista ajonopeuden jakaumaan pelk\u00e4n odotusarvon sijaan.\nTuloksista n\u00e4hd\u00e4\u00e4n, ett\u00e4 vallitsevat ymp\u00e4rist\u00f6n olosuhteet ovat yhteydess\u00e4 ajonopeuksien jakaumiin. Vesi- ja lumisade laskevat ajonopeuksia, ja vaikutus on sit\u00e4 voimakkaampi, mit\u00e4 kovempi sade on. Nopeuden pudotus selke\u00e4\u00e4n s\u00e4\u00e4h\u00e4n verrattuna on kohtalainen kovalla (1\u20134 km/h) ja j\u00e4\u00e4t\u00e4v\u00e4ll\u00e4 (2\u20139 km/h) vesisateella sek\u00e4 suurin kohtalaisella (5\u201312 km/h) ja kovalla (8\u201317 km/h) lumisateella. Lis\u00e4ksi tuloksista k\u00e4y ilmi, ett\u00e4 osalla mittauspisteist\u00e4 matalimmat ajonopeudet ovat hieman hitaampia h\u00e4m\u00e4r\u00e4ll\u00e4 ja pime\u00e4ll\u00e4 kuin valoisalla, mutta korkeimmilla nopeuksilla eroa valoisuuksien v\u00e4lill\u00e4 ei ole.", "language": "fi", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.abstract", "value": "", "language": "en", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Submitted by Miia Hakanen (mihakane@jyu.fi) on 2025-06-23T10:26:58Z\nNo. of bitstreams: 0", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Made available in DSpace on 2025-06-23T10:26:58Z (GMT). No. of bitstreams: 0\n Previous issue date: 2025", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.format.extent", "value": "113", "language": null, "element": "format", "qualifier": "extent", "schema": "dc"}, {"key": "dc.language.iso", "value": "fin", "language": null, "element": "language", "qualifier": "iso", "schema": "dc"}, {"key": "dc.rights", "value": "In Copyright", "language": null, "element": "rights", "qualifier": null, "schema": "dc"}, {"key": "dc.subject.other", "value": "kvantiiliregressio", "language": null, "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "ajonopeuden jakauma", "language": null, "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "valoisuus", "language": null, "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.title", "value": "S\u00e4\u00e4n vaikutus ajonopeuden jakaumaan", "language": null, "element": "title", "qualifier": null, "schema": "dc"}, {"key": "dc.type", "value": "master thesis", "language": null, "element": "type", "qualifier": null, "schema": "dc"}, {"key": "dc.identifier.urn", "value": "URN:NBN:fi:jyu-202506235634", "language": null, "element": "identifier", "qualifier": "urn", "schema": "dc"}, {"key": "dc.contributor.faculty", "value": "Matemaattis-luonnontieteellinen tiedekunta", "language": "fi", "element": "contributor", "qualifier": "faculty", "schema": "dc"}, {"key": "dc.contributor.faculty", "value": "Faculty of Sciences", "language": "en", "element": "contributor", "qualifier": "faculty", "schema": "dc"}, {"key": "dc.contributor.department", "value": "Matematiikan ja tilastotieteen laitos", "language": "fi", "element": "contributor", "qualifier": "department", "schema": "dc"}, {"key": "dc.contributor.department", "value": "Department of Mathematics and Statistics", "language": "en", "element": "contributor", "qualifier": "department", "schema": "dc"}, {"key": "dc.contributor.organization", "value": "Jyv\u00e4skyl\u00e4n yliopisto", "language": null, "element": "contributor", "qualifier": "organization", "schema": "dc"}, {"key": "dc.contributor.organization", "value": "University of Jyv\u00e4skyl\u00e4", "language": null, "element": "contributor", "qualifier": "organization", "schema": "dc"}, {"key": "dc.subject.discipline", "value": "Tilastotiede", "language": "fi", "element": "subject", "qualifier": "discipline", "schema": "dc"}, {"key": "dc.subject.discipline", "value": "Statistics", "language": "en", "element": "subject", "qualifier": "discipline", "schema": "dc"}, {"key": "dc.type.coar", "value": "http://purl.org/coar/resource_type/c_bdcc", "language": null, "element": "type", "qualifier": "coar", "schema": "dc"}, {"key": "dc.rights.copyright", "value": "\u00a9 The Author(s)", "language": "fi", "element": "rights", "qualifier": "copyright", "schema": "dc"}, {"key": "dc.rights.accesslevel", "value": "openAccess", "language": null, "element": "rights", "qualifier": "accesslevel", "schema": "dc"}, {"key": "dc.type.publication", "value": "masterThesis", "language": null, "element": "type", "qualifier": "publication", "schema": "dc"}, {"key": "dc.subject.yso", "value": "ajonopeus", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "s\u00e4\u00e4", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.rights.url", "value": "https://rightsstatements.org/page/InC/1.0/", "language": null, "element": "rights", "qualifier": "url", "schema": "dc"}]
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