In 1910, the main channel was widened and deepened (). Since then, the gap has widened. The windshield was widened for increased outward visibility. This in turn was considerably widened in 1925. Since opening, the M25 has been progressively widened, particularly near Heathrow Airport. In 2003, the agency's responsibilities were considerably widened. The tracks were further modified and the fenders widened. This causes the base of the widened pyramid to narrow. The fissure between the organizations was thus widened. An appropriated den is often widened and partly remade. Between 1820 and 2008, this gap widened from 0.8 to 2.7 times. Relationships with other nations widened rapidly after 1974. That lead eventually widened to 10,281 votes. The avenues were widened and received traffic lights. It was widened to four lanes in 1997.