Where does the additional traffic on a new or widened highway facility come from?
In metropolitan areas, highway facilities are usually built or widened where existing traffic congestion has already decreased travel speeds during certain times of the day. To avoid the congestion, some travelers may have diverted to alternative routes, changed the time they make their trips, switched to different travel modes, traveled to other destinations, or decided not to make a particular trip at all. The new or widened highway facility can carry significantly more traffic before it becomes congested. Many travelers who previously took other routes or traveled at other times may switch to the new facility to take advantage of decreased travel times. The increase in traffic on the new facility resulting from these changes is largely offset by reductions in traffic along parallel routes and at other times of the day. The net effect on region-wide daily vehicle miles of travel (VMT) resulting from these travel behavior changes is minimal. Decreased travel times may also encourage s
In metropolitan areas, highway facilities are usually built or widened where existing traffic congestion has already decreased travel speeds during certain times of the day. To avoid the congestion, some travelers may have diverted to alternative routes, changed the time they make their trips, switched to different travel modes, traveled to other destinations, or decided not to make a particular trip at all. The new or widened highway facility can carry significantly more traffic before it becomes congested. Many travelers who previously took other routes or traveled at other times may switch to the new facility to take advantage of decreased travel times. The increase in traffic on the new facility resulting from these changes is largely offset by reductions in traffic along parallel routes and at other times of the day. The net effect on region-wide daily vehicle miles of travel (VMT) resulting from these travel behavior changes is minimal. Decreased travel times may also encourage s
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- Where does the additional traffic on a new or widened highway facility come from?
