The speed limit on US 20 West / US 26 West starts out at 45 mph. Interstate 184 West will officially begin just ahead when US 20 West and US 26 West depart at the Boise River. (Photo taken 9/25/19).

Mileage sign listing the distances to the three upcoming exits. The first one will be the point at which Interstate 184 West begins. (Photo taken 9/25/19).

The speed limit increases to 60 mph approaching the departure of US 20 West / US 26 West. It will remain 60 mph for the full duration of Interstate 184 West. (Photo taken 9/25/19).

Follow US 20 West / US 26 West via the upcoming exit to get to the Fairgrounds. (Photo taken 9/25/19).

US 20 West / US 26 West as they start across the Boise River. (Photo taken 9/25/19).

Interstate 184 West / US 20 West / US 26 West at Exit: US 20 West / US 26 West - Garden City / Fairgrounds. This marks the official beginning of Interstate 184 West, noted by the shield on the overhead sign. (Photo taken 9/25/19).

View on Interstate 184 West as it continues across the Boise River. (Photo taken 9/25/19).

Overhead mileage sign listing the distances to the 4 exits on Interstate 184 West. (Photo taken 9/25/19).

Interstate 184 West at mile marker 3. (Photo taken 9/25/19).

Interstate 184 West at Exit 2: Curtis Rd / Fairview Ave (Photo taken 9/25/19).

Take Exit 1B to Boise Towne Square Mall. (Photo taken 9/25/19).

A narrow Interstate 184 West reassurance shield. (Photo taken 9/25/19).

View on Interstate 184 West at mile marker 2. The speed limit remains 60 mph for all traffic. (Photo taken 9/25/19).

Interstate 184 West at Exit 1B: Cole Road (Photo taken 9/25/19).

View on Interstate 184 West in Boise. (Photo taken 9/25/19).

Interstate 184 West at Exit 1A: Franklin Road (Photo taken 9/25/19).

View on Interstate 184 West as its interchange with Interstate 84 comes into view in the distance. (Photo taken 9/25/19).

Interstate 184 West at Exit 0: Interstate 84 East - Mountain Home. On the far right side of the interchange, we see that it also provides access to Interstate 84 West for traffic merging onto I-184 West from Franklin Road. (Photo taken 9/25/19).

View on Interstate 184 West as its ramp to Interstate 84 West prepares to pass under Exit 0's ramp to Interstate 84 East. (Photo taken 9/25/19).

Here, we see traffic from Franklin Road merging into the ramp from Interstate 184 West to Interstate 84 West. (Photo taken 9/25/19).

Interstate 184 West reaches its western terminus here, as it merges into Interstate 84 West at mile marker 49. (Photo taken 9/25/19).