This is a shame; my wife and I occasionally use this to figure out when the other one will be home. It's much safer when she's driving for me to look her up on Latitude than to call her all the time.
I think in your circumstances this will be better than Glympse, because your use case is about safety and the ambient location awareness, which isn't what Glympse provides. You have to send someone a "Glympse" notification with your location that has a limited window. Speaking from experience, it is hard to send while driving.
So, the feature's gone.
Not sure why they close Latitude before supporting their preferred alternative on all platforms.
One of the neat things is it also sends velocity, and an ETA. So when I get a Glympse message from somebody, it usually says something like "Derrick is headed NE on Rte. 3 at 55 MPH", or something to that effect.