Wildlife zones and lowered nighttime speed limits on some key corridors in Colorado are in effect as of the first of the month. Motorists can look for roadside reminders to slow down and watch for wildlife, and expect doubled fines for nighttime speeding in designated zones. The wildlife zone laws first went into effect last year and the Glenwood Sprigs office of the State Patrol says it's looking into whether a reduction of crashes in some areas can be attributed to the wildlife zone laws.