A rapid bus network in Montgomery County would cost roughly $1.83 billion to build and an additional $1.1 million per mile to operate each year, according to estimates from a county-commissioned panel.

The Transit Task Force, appointed by County Executive Ike Leggett, wants the system running in nine years and recommends a “world class,” 161.5-mile bus rapid transit, or BRT, network that runs along 23 major county thoroughfares and is built in three phases. The recommendations will be formally presented to Leggett in a report planned for release this week.