After an abbreviated initial season of bicycle sharing, the town is hoping to add a fourth Hubway station next year. Brookline launched three Hubway bicycle docks in August, and the regional bicycle network quickly began to generate more than 230 local bicycle trips per day, said Joe Viola, the town’s assistant director of community planning. The Hubway system, which provides bicycles for short-term rentals in Boston, Brookline, Cambridge, and Somerville, closed for the season last month. Viola said the town is hoping the bicycle-sharing system can build on its success when it reopens in the spring. In the meantime, Viola said, he is working to identify the location for the fourth Hubway site to go with the stations in Coolidge Corner and Brookline Village, and at Town Hall. Viola said the latest options include JFK Crossing on Harvard Street and Washington Square . He said he may go before the town’s Transportation Board next month to discuss the options, and whether the town would be willing to give up a parking space to accommodate another Hubway station.