In the Works - Community Newsletter - June 2020 | Page 17

An asphalt worker
applies a coat of tack on
the roadway before the
asphalt is laid down.
Speed humps, 3 ½ inches
high and about 12 feet wide,
stretch across lanes of traffic
to get drivers to slow down.
They “are the most effective
measure at reducing speeds
and are less resource
intensive than less effective
tools such as median islands,
traffic circles, or lane restriping,”
according to the
San Francisco Municipal
Transportation Agency.