In FIG 1, a reference numeral 4 denotes {TAIL ~ an inter bay route} as {HEAD ~ a main route and reference numerals} 6 to 8 denote intra bay routes 6 to 8 provided for respective bays 
In FIG 1 , a reference numeral 4 denotes { TAIL ~ an inter bay route } as { HEAD ~ a main route and reference numerals } 6 to 8 denote intra bay routes 6 to 8 provided for respective bays
OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH