• Federal Signal average return on investment for 2023 was 11.21, a 14.15% increase from 2022.
• Federal Signal average return on investment for 2022 was 9.82, a 7.62% increase from 2021.
• Federal Signal average return on investment for 2021 was 10.63, a 8.2% decline from 2020.

Roi - return on investment can be defined as an indicator of how profitable a company is relative to its assets invested by shareholders and long-term bond holders. Calculated by dividing a company's operating earnings by its long-term debt and shareholders equity.