Colorado has replaced 49 bridges as part of a program to fix structures rated poor by inspectors.
That’s less than a third of the estimated 160 bridges that are considered risky.
The state Department of Transportation says some were built in the 1920s and are buckling under the demands of modern car and truck traffic. Others are cracking and damaging vehicles with broken concrete.
Most of the money is coming from a bridge-safety surcharge ranging from $13 to $32 that is included in the price of vehicle registration.