The city is spending $15 million on 1,500 new cameras. Emanuel said the cameras helped police make an arrest in a string of robberies, including one at the Loyola Red Line stop, which is where he spoke on Saturday.
Video from the Armitage Brown Line station led to an arrest in the murder of a woman at a River North hotel.
Emanuel was asked Saturday if it was right for the CTA to spend money on technology when riders could be facing fare hikes and service cuts. In response, he said: "We have some choices to make. And they'll lay out their budget, but it's clear that we're investing and making sure that the dollars do not sit in the bureaucracy -- they go right to the platform, right to the bus shelter," Emanuel said.
All totaled, there will be 3,000 cameras at CTA stations around the city.