But on foot is a hue advantage. Just about possible to walk it back to manchester from Old Trafford but I reckon at least a 1/3rd of City fans walk it back to manchester. Huge numbers anywayI'd say go for it but the access to and from the stadium via transport is poor compared to Old Trafford. They've got motorways and main roads right by the ground, multiple metro stops and lines and a train station on a main line.
Eastlands is a nightmare to get away from unless on foot.
Bus back to Manchester City centre is doable in 20 minutes but if City added 10,000 seats or so, we might hit a tipping point when suddenly all the traffic snarls up. It wont be a linear effect. It will be smooth flow, and then gridlock at a certain point