Riverside Road and Riverside Close are both in Laverstock, close to the River Bourne.
Riverside, however, is in Wilton, close to the River Wylye.
As noted in the entry on Wylye Close the ‘Bourne’ is the second most popular river for road names in the Salisbury area, and the ‘Wylye’ is the fourth:
#1 The River Avon – 4 street names: Avon Approach, Avon Place, Avon Terrace, Avon View
#2 The River Bourne – 5 street names: Bourne Avenue, Bourne Close, Bourne Way
#3 The River Nadder – 2 street names: Nadder Lane, Nadder Terrace
#4 The River Wylye – just the one: Wylye Close
#5 The River Ebble – no street names in the immediate area
However, if you include the ‘Riversides’, the positions change:
#1 The River Bourne – 5 street names: Bourne Avenue, Bourne Close, Bourne Way, Riverside Road, Riverside Close
#2 The River Avon – 4 street names: Avon Approach, Avon Place, Avon Terrace, Avon View
#3= The River Nadder – 2 street names: Nadder Lane, Nadder Terrace
#3= The River Wylye – 2 street names: Wylye Close, Riverside
#5 The River Ebble – no street names in the immediate area
Update: I missed ‘Riverbourne Road’, so:
#1 The River Bourne – 6 street names: Bourne Avenue, Bourne Close, Bourne Way, Riverside Road, Riverside Close, Riverbourne Road
#2 The River Avon – 4 street names: Avon Approach, Avon Place, Avon Terrace, Avon View
#3= The River Nadder – 2 street names: Nadder Lane, Nadder Terrace
#3= The River Wylye – 2 street names: Wylye Close, Riverside
#5 The River Ebble – no street names in the immediate area
