Yes, this is allowable. Projects will be evaluated on a project by project basis regardless of how they are submitted to grants.gov.

Both the SF-424 and Program Supplemental forms can be downloaded from Grants.gov under the program opportunity tab.  The supplemental form is also available from the FTA website at...

An applicant must use the pdf supplemental form that is provided at Grants.gov or on FTA’s website. Other formats will not be accepted.

Grants.gov will allow you to upload supporting documents. Supporting documents may be helpful to reviewers, as they may confirm what is stated in the narrative.

For letters that you wish to have considered as a part of the application, address the letters to the FTA Program Manager.  For letters that require an official response, address the letter to the Acting Administrator at Federal Transit...

An applicant can choose either option; however, we recommend separate submissions for multiple agencies.

The appropriate documentation may vary depending on the source of local match. Examples could include a city council or board resolution to provide local match for the project or a letter from the state attesting to the availability of state funding...

The narrative should provide a complete explanation of the need for replacement buses, including any relevant supporting information. Attachments, such as a fleet inventory, vehicle status report, or other documentation, may be used to support the...

Funds must be obligated within 4 years (year of award plus 3 years) – September 30, 2020.

Applicants may provide a scalable option within their submission. FTA may award an amount that is less than the amount requested, provided that it will fund a project of independent utility.