So I searched and came up empty on this particular topic. We have everything on the best vehicles with multiple car seats, to what brand of car seat, but not position in the vehicle of the car seat.
Where in your vehicle did you put your car seat and why? Did you go behind the driver? Did you go behind the passenger? Or did you put your car seat in the middle?
D14 - Free For All
In loving memory of Baby HP42 and all D14 Angel Babies

Re: Car Seat Position
DS 06/2013
DD 12/2014
Mom to DD(4), DS(2) and # 3 Due 12/14/14
Mom to DD(4), DS(2) and # 3 Due 12/14/14
With DD1, I have her center in my car. DH has her behind driver so he could fold down the 40 section of the seat. When she moved into a convertible, I would sit on the seat to buckle in. That was nice when raining or really cold. Now with 2 car seats needing to fit, I still need to figure out where they will go. I'm thinking moving DD1 behind driver and putting DD2 center but haven't tried it yet.
Also, I know a PP already said it, but I wanted to say it again: most vehicles do not allow you to latch the car seat in the middle with the LATCH system, only on the sides (even if it looks like it should properly LATCH in the middle). The list of vehicles the car seat tech had that could use the LATCH in the middle didn't have any Hondas or toyotas on it (the two cars we have). So we installed ours in the center using the seat belt.
with ds#1 - he was in the middle (back seat)
once we had #2 they obviously went in the 2 back seats on each side.
now with #3 - ds#1 sits in the 3rd row in a booster seat, ds#2 is a car seat behind the driver and dc#3 will be behind the passenger.
~after 34 cycles we finally got our 2nd little bundle of joy~

My IF blog
@kimba1976 if your older child still fits, it's 5 times safer to keep her RFing until at least 2yr
I chose drivers side at first because I figured the most likely side impact collision would be getting T-boned turning left in an intersection and didn't think the passenger side would be safest. When she got older i moved her to the passenger side so that the driver could reach her if necessary and when she got out of the car on the street she would be on the sidewalk.
Now that we have three across one row we have DD forward facing in the middle and the two infant seats rear facing on the outer seats.
bfp#4 3/19/2014 edd 12/1/2014 please let this be the one!
beta @ 5w0d = 12,026! u/s 4/22/14 @ 8w1d it's twins!
BFP #1 5/12/12; EDD 1/20/13; Eliana Grace born 1/25/13
BFP #2 12/11/13; EDD 8/23/14; M/C 6 weeks
BFP #3 4/3/14; EDD 12/13/14
Also, 2yrs old isn't a magic number that it is as safe to turn forward. If your DD is within the RFing limits of seat it best for her to remain RFing.