Zobrazeno 1 - 10
of 18
pro vyhledávání: '"Jonathan Upchurch"'
Autor:
Jonathan Upchurch
Publikováno v:
Transportation Research Record: Journal of the Transportation Research Board. 2674:1-10
Constructed in 1930 and recently designated as a National Historic Civil Engineering Landmark, the 1.1 mile long Zion–Mt. Carmel Tunnel has served Zion National Park in Utah well for several decades. With the passage of time, however, vehicles have
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6ed1be7756b4395d343904e287c2c053
https://doi.org/10.1177/0361198119899670
https://doi.org/10.1177/0361198119899670
Autor:
Jonathan Upchurch
Publikováno v:
Transportation Research Record: Journal of the Transportation Research Board. 2499:40-44
In 2000, Zion National Park in Utah introduced the Zion Canyon shuttle to transport visitors into Zion Canyon while alleviating traffic congestion and improving visitor experience. Now in its 16th season of operation, the shuttle is successfully acco
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ec772707f9cebff29d04eb40aeae4bc7
https://doi.org/10.3141/2499-06
https://doi.org/10.3141/2499-06
Autor:
Jonathan Upchurch
Publikováno v:
Transportation Research Record: Journal of the Transportation Research Board. 1981:160-170
As many recreational tourists know, long queues of vehicles at park entrance stations during peak season are a problem for many national parks and monuments. In some instances, on holiday weekends the lines are known to extend 1 mi or more. Informati
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::813fa1b579d3d124c52197a6ccec6ad7
https://doi.org/10.1177/0361198106198100123
https://doi.org/10.1177/0361198106198100123
Publikováno v:
Transportation Research Record: Journal of the Transportation Research Board. 1918:35-45
In recent years U.S. freeways have seen an increase in the number of exit ramps that feature a two-lane exit with an option lane. This is a situation in which motorists in the rightmost lane of the freeway must exit, and those in the adjacent lane ma
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::248fd349fc0d969dc678fc265d10e1d9
https://doi.org/10.1177/0361198105191800105
https://doi.org/10.1177/0361198105191800105
Autor:
Hasmik Mehranian, Jonathan Upchurch, Anuj K. Pradhan, Donald L. Fisher, Matthew R. E. Romoser
Publikováno v:
Transportation Research Record: Journal of the Transportation Research Board. 1899:35-43
Two-lane freeway exits in which the left-hand exit lane also continues as a through (option) lane are becoming increasingly common. Potential problems can arise at these exits when drivers become confused by the signing and can lead to increases in d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::80e2be60764820c30d7344837280f96b
https://doi.org/10.3141/1899-05
https://doi.org/10.3141/1899-05
Publikováno v:
Transportation Research Record: Journal of the Transportation Research Board. 1801:9-17
The Central Artery–Tunnel (Interstate 93) through downtown Boston, Massachusetts, is being reconstructed as a tunnel 2.4 km (1.5 mi) long. Within the tunnel several exits require guide signing for motorist safety and efficient traffic operation. De
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f7d3b2e595be4ccc3b8f769ccae8a622
https://doi.org/10.3141/1801-02
https://doi.org/10.3141/1801-02
Autor:
Renatus N. Mussa, Jonathan Upchurch
Publikováno v:
Transportation. 29:287-305
This paper explores the efficacy of the driver-based incident detection using the vehicle-to-roadside communication (VRC) system. The proliferation of vehicle tags in the US for automatic toll collection, traffic monitoring, and vehicle navigation an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5fbdaacc7b6a73bab73c05b8f20e3c69
https://doi.org/10.1023/a:1015625801212
https://doi.org/10.1023/a:1015625801212
Autor:
Renatus N. Mussa, Jonathan Upchurch
Publikováno v:
Transportation Research Record: Journal of the Transportation Research Board. 1748:153-160
The efficacy of the driver-initiated incident detection system was assessed by modeling the use of new communications technologies to mitigate problems that beset current cellular call-in programs, problems such as insufficient information on inciden
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::db26d9aa1e55c406dc66eeb2525540e5
https://doi.org/10.3141/1748-19
https://doi.org/10.3141/1748-19
Autor:
Renatus N. Mussa, Jonathan Upchurch
Publikováno v:
Transportation. 26:399-416
This research study was designed to assess by simulation the efficacy of incident detection by cellular phone call-in programs. The assessment was conducted by varying the proportion of drivers with cellular phones on the highway so as to mirror the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d7fad506e15f0e09a48f31b77e3f381a
https://doi.org/10.1023/a:1005283307060
https://doi.org/10.1023/a:1005283307060
Publikováno v:
Transportation Research Part C: Emerging Technologies. 6:129-139
An analytical model was developed to assess the detection of freeway incidents by drivers using advanced communications technologies. Drivers can report incidents to a highway agency by voice or by digital messaging either directly or through roadsid
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2165f3401053f545f03630f97705046d
https://doi.org/10.1016/s0968-090x(98)00011-4
https://doi.org/10.1016/s0968-090x(98)00011-4