Texas Central has announced more than 30 percent of the parcels along the proposed route are already under land option purchase agreements, and in the counties in the lower portion of the alignment -- including Grimes, Madison and Waller counties -- more than half of the parcels are under agreement, Reed said.

Not all landowners are on board, though. The project has been met with strong resistance from some Texans, particularly in rural counties, and the company's eminent domain authority remains a point of contention.

Texas Central says state law gives it the right to use eminent domain in cases where agreements can't be reached with landowners. Critics, though, have challenged that the company is a railroad and therefore can't take land through eminent domain. Court cases on the issue are still playing out.

Reed said the company's goal is still to come to sales agreements with "every single landowner." Texas Central has also promised to minimize the impact of the bullet train on surrounding property through means such as building it on elevated tracks and berms, meaning there won't be any at-grade crossings.