This paper presents GIS-based methodology for urban area driving cycle construction. The approach reaches beyond the frames of usual driving cycle development methods and takes into account another ...perspective of data collection. Rather than planning data collection, the approach is based on available in-vehicle measurement data post processing using Geographic Information Systems to manipulate the excessive database and extract only the representative and geographically limited individual trip data. With such data post processing the data was carefully adjusted to include only the data that describe representative driving in Ljubljana urban area. The selected method for the driving cycle development is based on searching for the best microtrips combination while minimizing the difference between two vectors; one based on generated cycle and the other on the database. Accounting for a large random sample of actual trip data, our approach enables more representative area-specific driving cycle development than the previously used techniques.
In a century where mobility is becoming more sustainable in terms of energy transition, emissions reduction, and a healthy quality of life, the use of bicycles is increasing and has many advantages ...over other modes of transport that have been underused. The bicycle is an excellent alternative for short distances of up to five kilometers. In combination with public transportation, it can also successfully compete with motorized transport for longer distances. For the adequate development of cycling, it is necessary to create the right conditions in terms of accessibility and road safety. This means planning appropriate cycling infrastructure where cyclists feel comfortable and safe, which can lead to additional increased use in bicycles for everyday trips. Comfort for cyclists is a concept supported by road safety, a pleasant environment, connectivity, and the attractiveness of cycling infrastructure. In other words, cyclists respond to the physical, psychological, and sociological aspects of the cycling experience that are also related to the cycling infrastructure and environment: where I am, what I see and perceive, and how I feel. This paper presents the concept of the level of service for cyclists (BLOS) as a unified method for defining the comfort of cyclists. This paper presents the method for determining the level of service or comfort for bicyclists as a function of road width, width of the cycling area, traffic volume, and the speed and structure of motorized traffic flow. The result of BLOS, the mathematical model used, is graphically presented and allows decision-makers and designers of cycling infrastructure to easily assess the suitability of cycling infrastructure. Different diagrams for different input data are presented in the paper.
Development and wide use of route guidance systems lead to the need for suitable digital maps that can be used for some advanced applications. Sufficient accuracy of road geometry with emphasis on ...road centerline positions and curvature is crucial. In this paper is presented a method for finding road centerline curvature from raw GPS data. The approach consists of a few processing steps. First it is necessary to fit raw data of each road section using B-splines, and generate equidistant vertices of polyline of the fitted curve. Then follows the appliance of stereographic projection of chosen polyline segments onto the unit sphere. Using the least square method, the plane that best fits the points on the unit sphere is found and the circle that is the intersection of the plane and the unit sphere. Stereographic projection of this circle back to the equatorial plane gives the corresponding circular arc and curvature. The method is also applicable in higher dimensions. The 3D case is numerically presented and results show that the proposed procedure is efficient and yields accurate results.
According to the results of the survey carried out within the Sustainable Urban Mobility Plan for Ljubljana, the establishment of bicycle as equivalent means of transport is also what citizens want, ...as more than 90 percent of the respondents agree with the claim that it is necessary to improve the conditions for cycling in the field of transport regulation. Cycling is classified as slow moving traffic, but in cities it is among the fastest forms of transport. Because cycling is the most efficient (fastest) means of transport in shorter distances, a connected and uninterrupted network of cycling connections should reasonably be ensured mostly within cities in order to provide access to as many areas of the city as possible. ...it can be expected that after the establishment or the improvement of the connection, the number of cyclists will increase. Since 2011 he is a member of the Council of the Slovenian Traffic Safety Agency, responsible for the Road Safety Audit.
State of the Art of Slovenian Road Safety Kostanjšek, Jure; Marinko, Vesna; Lipar, Peter
Periodica polytechnica. Transportation engineering,
2014, Letnik:
42, Številka:
2
Journal Article
Recenzirano
Odprti dostop
The State of the Art of Slovenian Road Safety aims to provide a short description of road safety situation in Slovenia as well as to record all activities taken in Slovenia. This article is based on ...ROSEE ROad safety in South East European regions report. The road safety performance of Slovenia in comparison to other countries of South Eastern Europe is discussed. Basic road safety trends in Slovenia and a macroscopic analysis of road accident factors related to road users, road environment and vehicles are presented. Also the assessment of road safety legislation, policy and institutional capacity in Slovenia is undertaken. In this article, the assessment of needs and availability of road safety related data and information in Slovenia is also presented. Finally, the road network conditions in Slovenia, a general road safety assessment of the interurban road network and the status of Road Safety Audits are described.
Development and wide use of route guidance systems lead to the need for suitable digital maps that can be used for some advanced applications. Sufficient accuracy of road geometry with emphasis on ...road centerline positions and curvature is crucial. In this paper is presented a method for finding road centerline curvature from raw GPS data. The approach consists of a few processing steps. First it is necessary to fit raw data of each road section using B-splines, and generate equidistant vertices of polyline of the fitted curve. Then follows the appliance of stereographic projection of chosen polyline segments onto the unit sphere. Using the least square method, the plane that best fits the points on the unit sphere is found and the circle that is the intersection of the plane and the unit sphere. Stereographic projection of this circle back to the equatorial plane gives the corresponding circular arc and curvature. The method is also applicable in higher dimensions. The 3D case is numerically presented and results show that the proposed procedure is efficient and yields accurate results. Keywords: digital curve, road centerline GPS, segmentation, circular arc, B-splines, stereographic projection. Kelio marsruto parinkimo sistemu pletra vercia ieskoti tokiu skaitmeniniu zemelapiu, kurie galetu buti naudojami kai kuriose moderniose programose. Tiksli kelio geometrija, nurodanti centrines kelio linijos padeti ir kreive, yra ypac svarbi. siame straipsnyje pristatytas metodas, padedantis nustatyti centrines kelio linijos kreive pagal neapdorotus GPS duomenis. Metodas sudarytas is keliu etapu. Pirmiausia, naudojant B splainus atrenkami neapdoroti kiekvieno kelio ruozo duomenys ir suformuojamos vienodai nutolusios kreives polilinijos virsunes. Paskui taikoma stereografine pasirinktu poliliniju segmentu projekcija vienetineje sferoje. Maziausiuju kvadratu metodu randama plokstuma, labiausiai atitinkanti vienetines sferos taskus, ir apskritimas, kuris yra plokstumos ir vienetines sferos sankirta. sio apskritimo stereografine projekcija atgal i ekvatorine plokstuma padeda uzfiksuoti atitinkama apskritimo lanka ir kreive. sis metodas gali buti taikomas ir daugiamateje erdveje. Straipsnyje pateiktas trimacio modelio pavyzdys. Rezultatai parode, kad pasiulytasis metodas yra efektyvus, o gaunami rezultatai tikslus. Reiksminiai zodziai: skaitmenine kreive, centrine kelio linija GPS sistemoje, segmentacija, apskritimo lankas, B splainai, stereografine projekcija. Cela navigacijas sistemu attistiba un plasais pielietojums novedusi pie ta, ka modernai lietosanai nepieciesamas piemerotas digitalas kartes. Butiska ir cela Geometrijas pietiekama precizitate, specialu veribu pieversot cela ass pozicijai un liekumam. Dotaja raksta mes prezentejam metodi cela ass linijas liekuma noteiksanai no neapstradatiem GPS datiem. Metode sastav no daziem apstrades posmiem. Vispirms ir nepieciesams neapstradatos katras cela sekcijas datus aprakstit ar B-splainiem un Generet izveletas polilinijas vienada attaluma virsotnes. Pec tam izveletas polilinijas segmentus stereografiski projice uz vienibas sferu. izmantojot mazako novirzu kvadratu metodi tiek noteikta plakne, kas vislabak apraksta punktus uz vienibas sferas, un loks, kas veidojas krustojoties vienibas sferai un plaknei. Stereografiski projicejot ieguto loku atpakal uz ekvatorialo plakni, iegustam atbilstoso rinka loku un liekumu. Metode ir lietojama ari pie augstakam dimensijam. Skaitliski ir dots 3D piemers un rezultati rada, ka piedavata procedura ir efektiva un sniedz precizus rezultatus. Atslegvardi: digitala likne, cela ass linijas GPS, segmentacija, rinka loks, B-splains, stereografiska projekcija. Marsruudiplaneerimissusteemide laialdane kasutamine on tinginud vajaduse sobivate digitaalkaartide jarele, mida saaks kasutada teatavates rakendustes. Tee geomeetria piisav tapsus koos tee telgjoone asukohaga ja koverustega on aarmiselt oluline. Kaesolevas artiklis me esitame metoodika tee telgjoone maaramiseks tootlemata GPS-andmete alusel. Esiteks on oluline sobitada iga teeloigu tootlemata andmed kasutades B-splaine (uhenduspul-ki) ja genereerida murtud joone uhepikkuseid sektsioone sobitatud joonele. Sellele jargneb nende joonesektsioonide stereograafiline projekteerimine sfaarile. Kasutades vahemruutude meetodit leitakse tasapind, mis parimalt sobitud sfaaripunktidega ja ring, mis on tasapinna ja sfaari loikumiskoht. Ringi stereograafiline projektsioon ekvatoriaalsele tasapinnale annab meile vastava ringikaare ja koveruse. Meetod on samuti kasutatav korgemates dimensioonides. 3D juhtum on numbrilise naitega illustreeritud ja tulemused naitavad, et esitatud metoodika on efektiivne ja annaboigeid tulemusi. Votmesonad: digitaalne kover, tee telgjoon, GPS, segmenteerimine, ringikaar, B-splainid, stereograafiline projektsioon.
SI: V prispevku predstavljamo prilagojeno metodo za odkrivanje nevarnih odsekov in krajev, ki temelji na uporabi indeksa Getis-Ord G*. Od klasične metode se razlikuje v tem, da poleg teže nezgod ...upoštevamo prometne obremenitve na kraju nezgode. Metodaje bila uporabljena na primeru omrežja slovenskih avtocest in hitrih cest. Prikazani so rezultati analiz z upoštevanjem prometnih obremenitev in brez njih oziroma primerjava z metodama določanja gostote jeder in lokalnega Anselin-Moranovega indeksa.ENG: This paper presents a modified spatial statistical method for identifying road accident hot spots. Our suggested method is based on the Getis-Ord G* index. It differs from the standard method, because in addition to the number of accidents and their consequences, we also consider traffic at the locations of these accidents. The method was tested on the Slovene motorway network. The results are presented with and without considering traffic volumes and are compared with both Kernel density method and Anselin-Moran local index method.
This paper presents GIS-based methodology for urban area driving cycle construction. The approach reaches beyond the frames of usual driving cycle development methods and takes into account another ...perspective of data collection. Rather than planning data collection, the approach is based on available in-vehicle measurement data post processing using Geographic Information Systems to manipulate the excessive database and extract only the representative and geographically limited individual trip data. With such data post processing the data was carefully adjusted to include only the data that describe representative driving in Ljubljana urban area. The selected method for the driving cycle development is based on searching for the best microtrips combination while minimizing the difference between two vectors; one based on generated cycle and the other on the database. Accounting for a large random sample of actual trip data, our approach enables more representative area-specific driving cycle development than the previously used techniques.
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