```
def clamp_move(position, delta, width):
    if not isinstance(width, int) or width < 1:
        raise ValueError("width must be a positive integer")
    if not isinstance(position, int) or not 0 <= position < width:
        raise ValueError("position must sit inside the corridor")
    if not isinstance(delta, int) or delta == 0:
        raise ValueError("a move must be a non-zero integer")
    landed = min(width - 1, max(0, position + delta))
    return [landed, landed != position + delta]


def run_patrol(width: int, start: int, moves: list) -> dict:
    if not isinstance(moves, list):
        raise ValueError("moves must be a list")
    
    visited = set()
    bumps = 0
    current_position = start
    
    for move in moves:
        [landed, is_bumped] = clamp_move(current_position, move, width)
        if is_bumped:
            bumps += 1
        if landed != current_position:
            visited.add(landed)
        
        current_position = landed
    
    return {'position': current_position, 'bumps': bumps, 'visited': len(visited)}
```