Separate upper main lines

You should be able to use a Dremel to cut the center rail connection between the two switches.  The common should remain connected.  This is how I have mine set up.  I would also put a piece of styrene between the cut rails once done to ensure they don't touch.

Wow! Nice track work.    Allen has you fixed up and it  looks like you'd have to do both crossovers.

rockstars1989

Nice work. But I don't see any Signals on the Layout.

Integrated Signals Systems.com.

Has some very nice Signals for your new Layout.

Thanks, John  

If you put a jumper under the track, you will need to cut that jumper also.

It might be easier to go up from under the table to get to the jumper.

The Center rail track would still need to be cut and gaped on top at each crossing.

It is always best to bring jumpers under the table for access and trouble shooting.

You want to be able to isolate sectors for shorts and dead spots.

Hi Nick - I think you are on the right track to "Nine Mile & Mack."

     This is a local jingle in the Detroit Area, for a Ford Dealer but is a slang term in Detroit, meaning all is well.

Gary

• Cheers from The Detroit & Mackinac Railway, “ A Toy Train Layout” 

Yes. cut center rails with a 1-1/2" Fiberglass Reinforced Cut-off Wheel.

  Mask all around (newspaper & light mask tape) to protect from metal dust.  Cut center rails between turnouts, clean up, and put a little hot glue in the joint to keep joint insulated.

  Leave existing "home run" for one loop.  Add new "home run" to other loop.  Connect that new "home run" to the track taps at a terminal strip hidden by scenery.

Thanks everyone for the input.I am in high gear.Also special shout out to Detroit Rock City from Cleveland!!Nick

Nick, 
That trackwork looks great!

Nice stuff.

Mike

Thanks for the compliments!Wasn't expecting it.Nick