Worldwide Trolleybus Technology Development - a report for the Hong Kong Enviromental Protection Department by Ecotraffic, Research and Development AB. 46 pages. Hong Kong Trolleybus Report (775k pdf file)
Agenda of Greater Vancouver Transportation Authority
including recommendations and reasoning for acquiring 305 new Trolleybuses for replacement and extension
263 pages. Vancouver Trolleybus Report (2.2m pdf file)
'Analysis and design of Trolleybus overhead', a paper looking at considerations of the advantages of increasing line voltage to reduce current, line fittings and conductor wire sizes. Analysis and design of Trolleybus overhead (22k pdf file).