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The impact of shifting towards eco-friendly transportation at the University of Baghdad, Al-Jadriya Campus (UBAC)

Alrawi Firas, Alali Ali, Alaa Sarah, Saad Shurooq, Ameer Araz

Zeszyty Naukowe. Transport / Politechnika Śląska

2019

z. 105

5--14

In recent years, the UBAC has seen severe traffic congestion, resulting in various environmental and traffic problems at the university and its environs. This congestion was due to the significant expansions in buildings andan increase in the number of colleges in addition to the extensive use of private transport modes by students and university employees. This research was an attempt to find a solution for transportation problems in the UBAC, through studying the current transportation system inside the campus, and then suggesting alternatives to enhance the situation in the Campus and its environs as well. The study solutions focused on replacing the current diesel buses with battery-electric buses and restricting some of the private cars toward the Campus. This study supposes this transformation will reduce the CO2 emissions by (54%) in the morning peak hours and by (64%) in the afternoon peak hours, enhance the Passenger Car Unit (PCU) by (31%) in the morning peak hours and by (41%) in the afternoon peak hours, and will improve parking capacity by 114% inside the campus.

A Modified Approach for Estimation of Passenger Car Units on Intercity Divided Multilane Highways

Srikanth S., Mehar A.

Archives of Transport

2017

Vol. 42, iss. 2

65--74

The accuracy of measured traffic flow on a roadway is highly depends on correctness of PCUs used for converting traffic volume. Field data for the present study was collected from the mid-block road sections of different divided multilane highways in India. Video graphic method was used for collecting the field data. PCUs are estimated from the available methods as given in the literature by using traffic flow data observed in the field. Present study describes a modified methodology for estimation of PCU value of subject vehicles that includes the time headway as influencing parameter. The approach used in the present study is inspired from the method of dynamic PCU estimation where a PCU is expressed as the ratio of speed ratio and area ratio of standard cars to the subject vehicle type. Unlike dynamic PCU method, this method includes time headway factor for PCU estimation. The method found more realistic and logical as it provides relatively higher values of PCUs than those obtained from dynamic PCU method. Simulation of traffic flow was also performed through microscopic simulation model VISSIM for generating congestion and for comparing estimated PCU values at the level of maximum traffic volume. The methodology adopted in this study will be extended for development of comprehensive PCU model by including more numbers of influencing factors under varying traffic and roadway conditions.

"WAP over GPRS"

Parasiewicz O.

Przegląd Telekomunikacyjny + Wiadomości Telekomunikacyjne

2000

nr 5

397-399

Opisano ogólnie protokół WAP i technikę GPRS z punktu widzenia rozwiązań proponowanych przez firmę Ericsson. Zamieszczono informacje dotyczące implementacji obu tych systemów do istniejących sieci GSM, terminali i migracji sieci GSM do systemów 3G.

In the article general information about WAP protocol and GPRS system based on Ericsson solutions are described. There is also information how the systems are going to be implemented into existing GSM networks, about terminals and migration of existing GSM networks into 3G systems.