Why did they stop and move to 61 without exhausting all the options?

According to Wikipedia (US section)

• Alley (Allee, Ally, or Aly)
• Annex (Anex, Annx, or Anx)
• Arcade (Arc)
• Avenida
• Avenue (Av, Ave, Aven, Avenu, Avn, or Avnue)
• Bayou (Bayoo or Byu)
• Beach (Bch)
• Bend (Bnd)
• Bluff (Bluf or Blf)
• Bluffs (Blfs)
• Bottom (Bot, Bottm, or Btm)
• Boulevard (Boul, Boulv, Bld, Blv, or Blvd)
• Branch (Brnch or Br)
• Bridge (Brdge or Brg)
• Brook (Brk)
• Brooks (Brks)
• Burg (Bg)
• Burgs (Bgs)
• Bypass (Bypa, Bypas, Byps, or Byp)
• Calle
• Camino
• Camp (Cmp or Cp)
• Canyon (Canyn, Cnyn, or Cyn)
• Cape (Cpe)
• Causeway (Causwa or Cswy)
• Center (Cen, Cent, Centr, Centre, Cnter, Cntr, or Ctr)
• Centers (Ctrs)
• Circle (Circ, Circl, Crcl, Crcle, or Cir)
• Circles (Cirs)
• Cliff (Clf)
• Cliffs (Clfs)
• Club (Clb)
• Common (Cmn)
• Commons (Cmns)
• Corner (Cor)
• Corners (Cors)
• Course (Crse)
• Court (Ct)
• Courts (Cts)
• Cove (Cv)
• Coves (Cvs)
• Creek (Crk)
• Crescent (Crsent, Crsnt, or Cres)
• Crest (Crst)
• Crossing (Crssng or Xing)
• Crossroad (Xrd)
• Curve (Curv)
• Dale (Dl)
• Dam (Dm)
• Divide (Div, Dvd, or Dv)
• Drive (Driv, Drv, or Dr)
• Drives (Drs)
• Estate (Est)
• Estates (Ests)
• Expressway (Exp, Expr, Express, Expw, Expwy, or Expy)
• Extension (Extn, Extnsn, or Ext)
• Extensions (Exts)
• Fall
• Falls (Fls)
• Ferry (Frry or Fry)
• Field (Fld)
• Fields (Flds)
• Flat (Flt)
• Flats (Flts)
• Ford (Frd)
• Fords (Frds)
• Forest (Frst)
• Forge (Forg or Frg)
• Forges (Frgs)
• Fork (Frk)
• Forks (Frks)
• Fort (Frt or Ft)
• Freeway (Freewy, Frway, Frwy, or Fwy)
• Garden (Gardn, Grden, Grdn, or Gdn)
• Gardens (Gdns)
• Gateway (Gatewy, Gatway, Gtway, Gtwy)
• Glen (Gln)
• Glens (Glns)
• Green (Grn)
• Greens (Grns)
• Grove (Grov or Grv)
• Groves (Grvs)
• Harbor (Harb, Harbr, Hrbor, or Hbr)
• Harbors (Hbrs)
• Haven (Hvn)
• Heights (Hts)
• Highway (Highwy, Hiway, Hiwy, Hway, or Hwy)
• Hill (Hl)
• Hills (Hls)
• Hollow (Hllw, Holw, or Holws)
• Inlet (Inlt)
• Island (Is)
• Islands (Iss)
• Isle
• Junction (Jction, Jctn, Junctn, Juncton, or Jct)
• Junctions (Jcts)
• Key (Ky)
• Keys (Kys)
• Knoll (Knol or Knl)
• Knolls (Knls)
• Lake (Lk)
• Lakes (Lks)
• Land
• Landing (Lndng or Lndg)
• Lane (La or Ln)
• Light (Lgt)
• Lights (Lgts)
• Loaf (Lf)
• Lock (Lck)
• Locks (Lcks)
• Lodge (Ldge, Lodg, or Ldg)
• Loop (Lp)
• Mall
• Manor (Mnr)
• Manors (Mnrs)
• Meadow (Mdw)
• Meadows (Medows or Mdws)
• Mews
• Mill (Ml)
• Mills (Mls)
• Mission (Msn)
• Motorway (Mtwy)
• Mount (Mt)
• Mountain (Mtn)
• Mountains (Mtns)
• Neck (Nck)
• Orchard (Orchrd or Orch)
• Oval (Ovl)
• Overlook (Ovlk)
• Overpass (Opas)
• Park (Prk)
• Parks (Park)
• Parkway (Parkwy, Pkway, Pky, or Pkwy)
• Parkways (Pkwys)
• Pass
• Passage (Psge)
• Path
• Pike (Pk)
• Pine (Pne)
• Pines (Pnes)
• Place (Pl)
• Plain (Pln)
• Plains (Plns)
• Plaza (Plza or Plz)
• Point (Pt)
• Points (Pts)
• Port (Prt)
• Ports (Prts)
• Prairie (Prr or Pr)
• Radial (Rad, Radiel, or Radl)
• Ramp (Rmp)
• Ranch (Rnch or Rnchs)
• Rapid (Rpd)
• Rapids (Rpds)
• Rest (Rst)
• Ridge (Rdge or Rdg)
• Ridges (Rdgs)
• River (Rvr, Rivr, or Riv)
• Road (Rd)
• Roads (Rds)
• Route (Rte)
• Row
• Rue
• Run
• Shoal (Shl)
• Shoals (Shls)
• Shore (Shr)
• Shores (Shrs)
• Skyway (Skwy)
• Spring (Spng, Sprng, or Spg)
• Springs (Spgs)
• Spur
• Square (Sqr, Sqre, Squ, or Sq)
• Squares (Sqs)
• Station (Statn, Stn, or Sta)
• Strasse (the German word for street, used in Summit Park, Utah and one road in Niederwald, Texas)
• Stravenue (Strav, Straven, Stravn, Strvn, Strvnue, or Stra; unique to Tucson, Arizona)
• Stream (Streme or Strm)
• Street (Str, Strt, or St)
• Streets (Sts)
• Summit (Sumit, Sumitt, or Smt)
• Terrace (Terr or Ter)
• Throughway (Trwy)
• Trace (Trce)
• Track (Trak, Trk, or Trks)
• Trafficway (Trfy)
• Trail (Trl)
• Trailer (Trlr)
• Tunnel (Tunl)
• Turnpike (Trnpk, Turnpk, or Tpke)
• Underpass (Upas)
• Union (Un)
• Unions (Uns)
• Valley (Vally, Vlly, or Vly)
• Valleys (Vlys)
• Via
• Viaduct (Vdct, Viadct, or Via)
• View (Vw)
• Views (Vws)
• Village (Vill, Villag, Villg, or Vlg)
• Villages (Vlgs)
• Ville (Vl)
• Vista (Vist, Vst, Vsta, or Vis)
• Walk
• Wall
• Way (Wy)
• Well (Wl)
• Wells (Wls)