Subway car designing

If you could design a subway car, how would you design it.
Please give details such as seating, LED, & more

FINDs, non-transverse seating, 60 feet long, articulated into 5-car sets, slanted on one end of the set.

60 Feet long, Bucket Seats, Horizontal and Vertical seating (like in the R - 68), Slanted Front, 2 car sets, Rollsigns, Four pairs of doors on each side of the car.

75 Foot long, LED signs, strip maps, Orion VII OG/NG seats, seating like in R160s/R142s. Propulsion or whatever : R142A/R143. 4 doors each side. A and B cars.
Signs like the one in my sig.

1.) 60 Footer
2.) Announcements and interior LED like the R160s.
3.) Window seats and with some seats vertical: Kids can get a good look at window
4.) Seats like the Bombardier M7 LIRR/MNR set: Customers can feel more comfortable sitting
5.) Power/Wi-Fi: Customers can charge and play with laptops
6.) Articulated like the Novabus LFS Articulated (5 Car Married Pairs): So Customers can't slip or fall while going to another car set
7.) A propulsion similar to the R110As
8.) LED Exterior Sign like R142As (20-Character Limit) without lines and with Bright Green Color/Scrolling
9.) Doors just like the R110As: Sounds Cool
10.) Front and End will look like the R110As: That way, people will like to see the look of the front and back of the R110As.

R200.
1. 60 Foots (IRT only)
2. Interior LED signs like R160s/Outside signs like R160s
3. Benches that contain a soft part like the Orion 07.501s
4. Front will look like R142A
5. Propulsion same as R142A
6. Door chime like R62As
7. RAILFAN WINDOW!!!!!
8. B cars and A cars so people can look between cars.
9. Rollsigns that don't mess up for the front. LED signs fail.
10. FINES
Will only operate on the 7 line