The road side data exchange net includes {TAIL ~ a plurality} of road side data exchange devices set on {HEAD ~ neighboring roads} separately 
The road side data exchange net includes { TAIL ~ a plurality } of road side data exchange devices set on { HEAD ~ neighboring roads } separately
OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH