ORS § 184.647
In order to facilitate financing the costs advanced under ORS 184.645(2), the Department of Transportation may at any time during the biennium transfer to the Department of Transportation Working Capital Account such amounts as it considers necessary from funds available to the department for a biennial period. Funds transferred shall be retransferred from the Department of Transportation Working Capital Account by the department to the fund from which the original transfer was made prior to the last day of each biennial period. All or part of the funds remaining in the working capital account at the end of any biennium may remain in the account beyond the end of the biennium for the acquisition of data processing, word processing and photocopy equipment and services.
ORS 184.647