Lower speed limits. 35-40mph for all suburban arterials.
55mph for urban freeways.* Keep 75mph limit for rural freeways (cyclist in AZ use their shoulders)
Strict enforcement with no 11mph buffer (as is the official published buffer as communicated by local police). Enforce stopping laws too, change the mentality that its OK to roll thru turns. Stopping must be done at painted stop line.
*55mph urban freeway SL is important as there are exits ever 1mi or so and these exit lead onto roads cyclist use. Merging with cars exiting at 70mph as it is today is not pleasant.
Al