Colorado House Speaker Crisanta Duran on Wednesday said she rejects Republican suggestions that any transportation-funding initiative should be revenue-neutral in its first year.

That throws yet another potential roadblock into negotiations that have become tricky enough that a group of 23 business organizations wrote to Capitol leaders earlier in the day to try to push them again to find a compromise solution.

Duran, D-Denver, said in a press availability in her office that any plan to ramp up…