Deletion of Alexander ALX500

Comment: These buses were all developed in the same timeframe, with just sizing differences so a merge seems to be an acceptable choice. Though, noting that  isn't a hard and fast rule, for public infrastructure articles one or two sources are usually enough for GNG
Stance: merge
Cited policy: Wikipedia:Reliable sources (WP:THREE)

Comment: per .  Was used in HK and so covered in sources like ''https://www.google.co.uk/books/edition/Hong_Kong_Buses/pD3KDwAAQBAJ?hl=en Hong Kong Buses
Stance: keep
Cited policy: Wikipedia:Deletion policy (WP:ATD)