Here is a summary of the speed limit changes in the West since the federal 55-mph law was repealed:
Alaska
Law: No change since federal law was repealed. Limit is 65 mph on rural interstates and 55 mph near towns.
Fines: Speeders pay fines of $4 for each mile over the limit up to 19 miles, and $6 a mile if they exceed the limit by 20 miles or more.
Arizona
Law: Began phasing in higher speed limits in December, raising limits to 75 mph on 629 miles of rural interstate. In July, the limit was raised to 75 mph on 208 miles of Interstate 40. The state is considering higher limits on most of Interstates 17 and 19.
Fines: Vary by court jurisdiction. In Maricopa County, which is home to Phoenix, fines range from $25 to $50 for 1-10 mph over the limit, and $5 is added for each additional mile.
California
Law: Began phasing in higher speed limits Dec. 17. Limit increased from 55 mph to 65 mph on 2,800 miles of interstate in mostly urban areas; from 65 mph to 70 mph on nearly 1,300 miles of mostly rural roads.
Fines: Vary from county to county. In Sacramento County, fines range from $87 to $146. Speeders caught for driving more than 26 mph over the limit must appear in court, with the fine set by a judge. Previous offenses make the penalties worse.
Colorado
Law: Began phasing in higher limits May 28. Limit increased from 65 mph to 75 mph on rural stretches of interstates and state and federal highways, with 65 mph retained through the mountainous sections of Interstate 70; 55 mph retained through urban areas.
Fines: $17 to $112 for up to 24 mph over the limit, automatic court summons for 25-plus mph over the limit.
Hawaii
Law: No change since federal law was repealed. Limit ranges up to 55 mph.
Fines: Violators are charged $4 for every mile over the limit, plus $7 to support the state district court's driver's education division.
Idaho
Law: Began phasing in changes May 1. Speed limit increased from 65 mph to 75 mph on most of the interstates; from 55 mph to 65 mph through urban areas, with the exception of Boise, which was left at 55 mph. Other state and federal roads are being raised from 55 mph to 60 mph and 65 mph, depending on terrain.
Fines: $47 for up to 24 mph over the limit; $102 for speeds 25 mph or greater over the posted limit.
Montana
Law: Speed limit increased from 55 mph to no set daytime limit for cars, except for what is "reasonable and prudent," as defined by the officer on patrol, who considers a variety of factors from the condition of the roads and vehicle to weather. Trucks limited to 65 mph in daytime. At night, all vehicles can drive 65 mph on the interstate, except in certain areas where the posted limit is 55 mph.
Fines: $70 to $500.
Nevada
Law: Raised limits from 55 mph to 75 mph beginning Dec. 8 on rural stretches of federal highways and interstates. Urban areas range from 55 mph to 65 mph, depending on conditions.
Fines: Vary by court jurisdiction. In Reno-Sparks area, fine is $35 plus a $10 administrative fee for 1-10 mph over the limit. In Tahoe-Douglas County, fine is $49, plus $10 administrative fee for 10-20 mph over the limit. Other jurisdictions are $2-$4 per mile. Previously, motorists paid a $15 energy-wasting ticket for speeds up to 70 mph.
New Mexico
Law: Speed limit increased beginning May 15 from 65 mph to 75 mph on most interstates. In other areas, the new limit was based on terrain, increasing from 55 mph to 60 mph, 65 mph or 70 mph.
Fines: $39 to $224, up from $32 to $217 the previous year due to an assessment for a court automation program.
Oregon
Law: Oregon Legislature has not met since the federal limit was lifted. On Interstate 5, Interstate 84 and Interstate 205, the 65-mph limit has been in place for several years. No set limits on state and federal two-lane highways in rural areas, with motorists required to observe reasonable and prudent speeds. It is 55 mph on all highways for trucks and passenger transport vehicles, such as school buses. City and county roads in urban areas with more than 100,000 residents are 55 mph.
Fines: $99 to $285.
Utah
Law: Began phasing in changes May 15. Speed limit is 75 mph on rural interstates and 65 mph on interstates in urban areas. Some stretches are posted at 60 mph because of terrain.
Fines: $47 to $87.
Washington
Law: Speed limit was raised on March 11 to 70 mph on rural stretches of interstate and 60 mph in busy areas, such as the Interstate 5 corridor from Seattle to Olympia. The state is evaluating other roads for possible increases.
Fines: $38 to $332.
Wyoming
Law: Speed limit increased from 65 mph to 75 mph on Dec. 8, with 60-mph limit in effect in some urban areas. Increase from 55 mph to 65 mph was phased in soon afterward on most primary highways.
Fines: From $35 to $200. Previously, motorists paid $5 for up to 10 mph over the limit, with the $5 returned to those who wore seat belts.