GOLDEN — On Monday, the city plans to expand a bus program that runs between its downtown and the last stop on the W-Line — a so-called “first mile/final mile” service for commuters that is gaining traction across metro Denver. But proposed service cuts to Regional Transportation District’s Denver-Golden light rail line, prompted by lower-than-expected ridership, could undermine the city’s efforts to get buy-in from its residents on public transit as a meaningful alternative to driving. The City Council last week passed a resolution asking the RTD to consider delaying any service cuts by a year or, short of that, tinker instead with the W-Line’s weekend or late-night schedule. “If they could find a way to either delay or keep that service for those six hours in the middle of the weekday, we think we could really boost ridership,” said Steve Glueck, Golden’s community and economic development director. The RTD board of directors this fall will consider whether to curtail weekday frequency on the W-Line — from every 15 minutes to every 30 minutes — between the Federal Center Station and the Golden Station between 9 a.m.