How can a part of a closed runway (5R) be used for taxiing ? Does this happen in other airports ?
This runway in question was situated between the runway in use (left) and the the passenger terminals (right)... depending on which position you are looking at the airport from. Hence, imagine if an aircraft landed on 5L
and uses only less than half the runway for slowing down, does this mean that he would need to taxi all the way to the end of the runway to vacate? Not very efficient for airport ops, especially during peak hours.
Therefore, parts of 5R had to be opened so that aircraft landing on 5L
could use the accessway to vacate the runway upon landing. And yes, this is practiced in airports around the world. As to why the unused runway was lit, I shall not speculate should this lead to another who-is-to-blame thread. But the runway edge lights of 5R (unused runway)should be OFF leaving only the taxiway lights at the accessways ON