"Forward" vs. "ahead": navigating words of direction and progress

What is similar?
Both "forward" and "ahead" can imply movement in a direction that is considered in front or towards a goal, and are often used interchangeably in informal speech to suggest progress or advancement.
What is different?
While "forward" emphasizes movement towards a front position or a goal, "ahead" focuses more on being in a leading position or in advance of someone or something.
Which one is more common?

Examples of usage
Forward- Please move forward in line.
- We need to push this project forward.
- Forward your email to me when you get a chance.
- The car inched ahead in the traffic.
- Plan ahead to avoid any last-minute issues.
- There is a long road ahead.