The phrase "estimated increase" means the predicted or guessed rise or growth in something. It indicates a calculated projection of how much something is expected to go up or expand. Full definition
It's pretty good though, and sometimes with a fair amount of regenerative energy return, one can even see the range estimate increase a mile or two or more. (hybridcars.com)
The budget estimates the increase in the annual limit will reduce federal revenue by $ 1.1 billion from 2015 - 2016 to 2019 - 2020. (business.financialpost.com)
If they were, wouldn't there be trends in, for example, sensitivity estimates increasing over time rather than staying fairly stable? (realclimate.org)