1.Problems
(1)When front windous are hardly provided, because of chair seats are arranged fore direction,fore view is almost impossible.(2)Because of chair seats for plural persons are arranged less front clear space,access from passages to each seats are not easy. (3)Because of chair seats for plural persons are arranged parolled to passages,moving persons disturb sitting persons' view. 2. Solutions
To provide a centre line passage, plural transversely branched passages, sandwiched between branched passages and arranged grouply opposite chair seats for one or two persons.