SORU: aşağıdaki parçaya göre cevaplayınız
We understand from the passage that there was a great demand for highway bridges in the 20th century ----.
Just as railway bridges were the great structural
symbols of the 19th century, highway bridges became
the engineering emblems of the 20 century. The
invention of the automobile created an irresistible
demand for paved roads and vehicular bridges
throughout the developed world. The type of bridge
needed for cars and trucks, however, is fundamentally
different from that needed for locomotives. Most
highway bridges carry lighter loads than railway
bridges do, and their roadways can be sharply curved or
steeply sloping. To meet these needs, many turn-ofthe-
century bridge designers began working with a
new building material: reinforced concrete, which has
steel bars embedded in it. And the master of this new
material was Swiss structural engineer Robert Maillart,
who designed some of the most original and influential
bridges of the modern era.