By Kate Porter, CBC News Ottawa, February 22, 2017
People who are blind or visually impaired will soon be able to hear the number and direction of an OC Transpo bus from the outside of the transit vehicle.
Ottawa city council approved an amendment to the noise bylaw at its Feb. 22 meeting to allow the information to be announced on exterior speakers.The announcement will be made in both French and English, last between nine and 13 seconds, and be broadcast five to nine decibels louder than the ambient noise at a stop, and at an even quieter level after 9 p.m..
http://www.cbc.ca/news/canada/ottawa/oc-transpo-buses-external-speakers-to-help-visually-impaired-riders-1.3994245