it depends what you count as Beijing, i used to ride bicycle sometimes from eastern Beijing to western part and it's easily 40-50 minutes in heavy traffic with

it depends what you count as Beijing, i used to ride bicycle sometimes from eastern Beijing to western part and it's easily 40-50 minutes in heavy traffic with numerous traffic lights, i don't think it would be even 30km across actually using car in Beijing it's pretty stupid, why would you do it? it's flat as pancake, ideal for biking same as Bangkok, you don't even need car for grocery since you can have it delivered for free right to your door, even if you don't have elevator, more convenient and cheaper than shopping with car, subway station it's always pretty much less than 1km walk unless you live in Beijing suburbs shame there is not done elevated LRT, since buses are useless and there are no trams/trains either so only solution to avoid traffic jams it's subway, elevated LRT could have more frequent stops in places subway can't reach or where it's not possible to upgrade capacity anymore