Alternative 1  (aerial monorail along 405)

Alternative 3 (aerial monorail along 405 with partial tunneling)

Alternative 4 (automated heavy rail under the Santa Monica mountains, aerial in the Valley)

Alternative 5 (automated heavy rail under the Santa Monica mountains, underground in the Valley)

Alternative 6 (driver-operated heavy rail under the Santa Monica mountains, underground in the Valley)

There are currently 6 options being considered: 3 that involve tunneling a subway from UCLA to the San Fernando Valley, and 2 that involve a mostly above-ground monorail along the 405. There were originally 6 options, but "Alternative 2" has already been eliminated.

Under CEQA, LA Metro also has to study a no-build options, which would mean the project doesn't go ahead.

If an alternative hasn't been chosen by the close date, I'll extend.