Big "T" or little "T?" What are your thoughts on polka dots? Would it be weird if the Green Line trains had black paneling? 

You decide. The MBTA was asking T-riders to weigh in this week on new designs for the slick new trains coming to Boston's ancient subway system. A poll on SurveyMonkey went live on Tuesday and was set to run through Tuesday, November 3.

There are three options for the Green, Orange and Red lines, which were scheduled to get their new train deliveries beginning in 2017. Transportation officials said the cars would come with computer-controlled lighting, heating and air conditioning and new signs and displays.

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The upgrade as promised was being touted as a big deal for the city's transit system.

“The manufacture and delivery of new rail cars will go a long way to enhancing MBTA service that our customers deserve and expect,” said MassDOT Secretary Stephanie Pollack in a statement. “In recognition of how important our customers are, and the importance of the role the T plays in the region, we are launching this contest to take this process one step further and let our customers have direct input on the final exterior design of the new vehicles.”

Here's the schedule for the new train cars' arrival, according to the MBTA: 24 Green Line cars starting in 2017, 152 Orange Line cars starting in 2018 and 132 Red Line cars starting in late 2019.

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“We’re moving another step closer to replacing some of the oldest cars on the T’s three busiest rapid transit lines,” said MBTA General Manager Frank DePaola, also in a statement. “As these new cars are introduced to the Green, Orange, and Red Line fleets, customers will experience improvements in both capacity and reliability.”