** Citi sees low headwinds for toll road operator Transurban Group TCL.AX as Westgate tunnel project opens
** Citi sees upside from higher prices and a "better than market expected outcome on cost optimization."
** Brokerage says longer-term growth for co should come from project wins, sees potential for winning of Gateway upgrade as part of Olympics work in Brisbane
** Citi "buy" rated on stock with a A$16.10 price target
** All but one of 13 analysts rated "hold" on shares; just one "buy" rated, as per LSEG-compiled data
** Stock up 9.4% YTD, last closed up 0.2% at A$14.65
(Reporting by Nichiket Sunil in Bengaluru; Editing by Nia Williams)
((Nichiket.Sunil@thomsonreuters.com))