print "'$_'" for split '\s*([&/+-])\s*|\s+', '129-129A & B-131 NORTH AV';
'129'                   ## Match the first '-', produce '129'
'-'                     ## and the captured delimiter
'129A'                  ## Match ' & ', produce '129A'
'&'                     ## and the captured delimiter
'B'                     ## Match the second '-', produce 'B'
'-'                     ## and the captured delimiter
'131'                   ## Match the first space, produce '131'
Use of uninit...        ## and undef for the empty delimiter
''                      ## and a nullstring for luck?
'NORTH'                 ## Match the second space, produde 'NORTH'
Use of uninit...        ## and undef for the empty capture
''                      ## and a nullstring for luck?
'AV'                    ## And the tail of the string.