ADVANCE FOR USE MONDAY JUNE 4 - In this Thursday, May 24, 2018 photo, METRO Chief Technology Officer Randy Frazier, left, and Mike McCulloch, 63, a member of the test group that helps Metro experiment with bluetooth beacons, pose for a photograph at a bus stop. in Houston, with an app-in-progress that McCulloch is assisting to develop an APP for visually-impaired passengers. For around $375,000, Metro officials plan to place beacons at bus stops that will communicate with smartphones, giving vision-impaired passengers precise information. They will be the first in the nation to widespread deploy the devices. (Yi-Chin Lee/Houston Chronicle via AP)
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