That's right - for embedded track, there's a rubber boot that covers encapsulates the rail in the concrete to reduce noise and vibration. To hold it in place when they pour the concrete, they use duct tape.
The Rapid Transit team actually tweeted about this earlier this week, and they're preparing a video about it.
Here are some close-up photos from last fall, before and after a pour:
The Rapid Transit team actually tweeted about this earlier this week, and they're preparing a video about it.
Here are some close-up photos from last fall, before and after a pour: