Where is the most compression force on a simple beam bridge?

In a simple beam bridge, the most compression force typically occurs at the top of the beam, particularly near the supports where the beam meets the abutments. This is due to the bending moment created by the load applied to the beam, which causes the upper fibers to experience compression while the lower fibers experience tension. The distribution of forces is most pronounced at the ends, diminishing towards the center of the span.