Part of your next conceptual step is realizing that the speed of the photons will measure the same to anyone, 100% of light speed. In the vehicle, you'll measu

Part of your next conceptual step is realizing that the speed of the photons will measure the same to anyone, 100% of light speed. In the vehicle, you'll measure the photons moving at 100% c. Someone outside the vehicle as it speeds by will see the photons moving at 100% c - as you approach and as you move away. Other parts of spacetime change to accommodate this, effectively.