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The series raised awareness of progresses being made in cities as they became more blind-friendly.
The treaty will also help charities sidestep copyright laws in the 127 poor countries without legal provision for blind-friendly formats.
"It could easily be made about half the size, and the replaceable batteries should be replaced by rechargeables with a blind-friendly charging method -- either a wireless or magnetically-aligning power plug."
As part of the light rail project, CityPass plans to install blind-friendly traffic lights along the route, and has developed a number of sites along the route, such as Davidka Square.
The Marrakesh meeting was to finalise a copyright treaty, of which the most important provision - according to Dan Pescod of Britain's Royal National Institute of Blind People - is to allow blind-friendly books to be exported.