Help! I'm a baby killer!

The Earth is going to have to answer some very serious questions here in the near future.

What if we based off our decisions on the question is this the best decision for the greater good?

I am an engineer.  I just created the first self driving car and am now programming it.  To take the "right" steps, turn left turn right.  But when an accident happens, the car must be programmed for that as well.

Alienoid is driving down Highway 1 in California.  It hits a hipster metal shaped scarf someone has discarded on the road which causes the car to go into a spin cycle.  It has lost control and now has to make a decision.

1.  Continue to go straight, demolish the railing, and plunge straight into the Pacific Ocean killing all 4 PhD students attending Stanford working on taking people into space.

2.  Veer right and hit a bus of elderly tourists average age of 80 years old with 2 kids each, along with 1 grand child.

3.  Veer left into an oncoming car with basically an unfortunate single mother unfortunately who has mental issues and a newborn baby.  They're on walfare, unemployment, Obama Care AND food stamps.  Data analysis show that a child with this upbringing has a 80% chance of committing multiple crimes and long stints in jail which will directly cost the overall greater good $1.4 billion over his life time paid by the foreseeable government.

Alienoid has to decide.  What does it do?

If I'm the programmer, I chose to veer left and kill the baby.  I'm a baby killer.

If you are not a baby killer, than what will you choose?  Who gets to choose?  Does the whole world get a vote on a single question?

I think in an ideal world everyone has a device, let's say a cell phone and everyone gets to cast their votes for issues so that everything we do is for the greater man kind.

The example I heard is that there are 10 cavemen.  9 are skinny and there is 1 fat one blocking the way.  The 9 must agree to kill the fat guy so that they can get out of the cave and live.

Humans will have to answer some very important questions soon.