Abstract
In order to create a practical road-resistance function for work zones under different lane occupation conditions, the expected speed of vehicles was calibrated in the work zone simulation model based on measured data, and simulation models were constructed for the closed half lane and the closed inside lane under different rates of trucks. Based on the statistical theory, the influence of significance of traffic volume and truck ratios for road resistance was analyzed, and a suitable truck ratio was found for the work zone. By using the optimal nonlinear fitting theory, the practical road-resistance function for work zones under different lane occupation conditions was constructed. The results showed that the road resistance is significantly affected by the traffic volume and rate of trucks. Under the same truck ratio, the road resistance linearly increases slowly when the traffic volume is less than the critical traffic volume and rapid increases irregularly when it is greater than the critical traffic volume. Under the same traffic load, the road resistance of the work zone increases with the increase in the rate of trucks, and the difference is not obvious when the traffic volume is less than the critical traffic volume, and increases gradually when it is greater than the critical traffic volume. Through the goodness of fit test and the homogeneity of variance test, the road-resistance function constructed in this paper has high goodness of fit. The practical road-resistance functions constructed in this study could be used to guide the diversion of the rebuilt/expanded highway to ensure traffic safety. Further, the study provides a theoretical basis for the construction of intelligent highway work zones.
Highlights
In recent years, the increase in new road projects tends to be stable, whereas road reconstruction and expansion projects show an increasing trend year by year
This paper calibrates the simulation model based on the actual measurement data of the construction area and conducts research on the practical road-resistance functions of work zone under different traffic conditions
This paper proposes a microscopic simulation model calibration method that aims at optimizing a midonateofehxfedsmtepathiishgcseeeeWuanerTWatiorshmohooeipuhnir-perseeoersdnehernnfpitra--eccthaaeoctaauatfrpiaflrftnior-rneeordiegurysrcrgfeyttgsifpsisinieschvpnircgpgteoeagthsennieopleverogdeuonoodeuos,tssurns,rtebitgiehbtt(hstuihsMhuheveatseumtiOwamt(rwsayMlieEsol[sios1notc)trOoeri5rksdctkso]iEtoitt.zsaoszis)ocvltt,ogrhtdoniphnitopeiebyaseeriurtsricsrretiattiiehmislmebmoelimsemuunvetuvt.lastu[aila,enF1oatlnro5atitnpoit]trcqo.ain.qaotunFr,hluna,oeinebenmurmourpoettaeeathototlroeideelnoaenrnelmnpngyllgyaccteisrthasatshhael,lhpiim,ordbboesdurerueroelaalftdlaloftetdaiiyrrbowoyswmenntehitoeemimapfmdipvseabeaeit,yetohy,hpthrartroaearaaotrtadtlvfuteffifmeiofngtocnihrhtocrmtiacadoicoctoleneorlandmllolisitlmstsoiootssithoidst-htoheanhearnxteslotespsa,cuo,cfeeatpgfaehrtlehlcttiiacibcim.bmtt.rIrcteaItaiahtrntzfctoiefcitioaessnoaannecslnng-t bring the simulation closer to the actual value in many aspects
Summary
The increase in new road projects tends to be stable, whereas road reconstruction and expansion projects show an increasing trend year by year. The current road resistance function is not applicable to the expressway reconstruction and expansion section, so it is necessary to construct a practical road resistance function that can adapt to the driving characteristics of the construction area. On the basis of comprehensive consideration of traffic flow, traffic environment, traffic organization and other factors, most scholars have re-calibrated, revised, and improved the existing road resistance function model [4,5,6,7,8,9,10,11,12]. It is necessary to study the road-resistance function of the reconstruction and expansion and to consider the driving characteristics of the construction area before building a practical road-resistance function. This paper calibrates the simulation model based on the actual measurement data of the construction area and conducts research on the practical road-resistance functions of work zone under different traffic conditions. The results show that the proposed models have better adaptability than the conventional model when the load ratio (q/c) is relatively high
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
