U.S. Route 20 traverses Iowa east-west for 300 miles, connecting with Interstates 29, 35, and 380. It passes through Sioux City, Fort Dodge, Waterloo, and Dubuque. It overlaps with U.S. 75 and briefly with I-129.
US 20: DQ – US 20 @ E Mississippi River Bridge – East (25)
US 20: DQ – US 20 @ E Mississippi River Bridge – West (24)
US 20: DQ – US 20 @ W Mississippi River Bridge – East (23)
US 20: DQ – US 20 @ W Mississippi River Bridge – West (22)
US 20: DQ – US 20 @ Locust St – North (21)
US 20: DQ – US 20 @ Locust St – West (19)
US 20: DQ – US 20 @ Locust St – West Zoom (18)
US 20: DQ – US 20 @ Locust St – East (20)
US 20: DQ – US 61 @ Catfish Creek DMS – North (01)
US 20: DQ – US 20 @ Bryant St – East (33)
US 20: DQ – US 20 @ JFK Rd – West (17)
US 20: DQ – US 20 @ JFK Rd (16)
US 20: RWIS – US 20 MM 316 @ Dubuque: R20: East View
US 20: RWIS – US 20 MM 316 @ Dubuque: R20: US 20
US 20: RWIS – US 20 MM 316 @ Dubuque: R20: US 20 Bridges
US 20: RWIS – US 20 MM 316 @ Dubuque: R20: US 20 EB
US 20: RWIS – US 20 MM 316 @ Dubuque: R20: US 20 Intersection
US 20: RWIS – US 20 MM 316 @ Dubuque: R20: West View
US 20: RWIS – US 20 MM 316 @ Dubuque: R20: West Zoom
US 20: DQ – US 20 @ NW Arterial – West (13)
US 20: DQ – US 20 @ NW Arterial – West Zoom (14)
US 20: DQ – US 20 @ NW Arterial – North (12)
US 20: DQ – US 20 @ NW Arterial – East (15)
US 20: DQ – US 20 @ NW Arterial – East Wide Angle (11)
US 20: DQ – US 20 @ Menards Hill – South (10)
US 20: DQ – US 20 @ SW Arterial Bridge – East (08)
US 20: DQ – US 20 @ SW Arterial – EB Exit Ramp – West (09)
US 20: DQ – US 20 @ SW Arterial West Ramp Terminal – East (07)
US 20: WWD – US 20 @ X49 near Dyersville (62)
US 20: RWIS – US 20 MM 277 @ Manchester: R27: US 20
US 20: RWIS – US 20 MM 277 @ Manchester: R27: US 20 Bridges
US 20: RWIS – US 20 MM 277 @ Manchester: R27: US 20 East
US 20: RWIS – US 20 MM 277 @ Manchester: R27: US 20 East Zoom
US 20: RWIS – US 20 MM 277 @ Manchester: R27: US 20 West Zoom
US 20: WL – US 20 @ S. Canfield Road (18)
US 20: WL – US 20 @ Hammond (03)
US 20: WL – US 20 @ Hawkeye Road (02)
US 20: WL – US 20 @ Ansborough (01)
US 20: WL – US 20 @ US 63 (28)
US 20: RWIS – US 20 MM 181 @ Steamboat Rock: R50: South View
US 20: RWIS – US 20 MM 181 @ Steamboat Rock: R50: US 20 Bridges
US 20: RWIS – US 20 MM 181 @ Steamboat Rock: R50: US 20 East
US 20: RWIS – US 20 MM 181 @ Steamboat Rock: R50: US 20 East Zoom
US 20: RWIS – US 20 MM 181 @ Steamboat Rock: R50: US 20 Road
US 20: RWIS – US 20 MM 181 @ Steamboat Rock: R50: US 20 Sensor
US 20: RWIS – US 20 MM 181 @ Steamboat Rock: R50: West View
US 20: RWIS – US 20 MM 181 @ Steamboat Rock: R50: West Zoom
US 20: D1 – US 20 @ MM 126.20
US 20: D1 – US 20 @ MM 126.20 – Quad: D1 – US 20 @ MM 126.20 – Quad
US 20: WWD – US 20 @ Poplar Ave (64)
US 20: D1 – US 20 @ MM 124 (124)
US 20: D1 – US 20 @ MM 121 (121)
US 20: RWIS – US 20 MM 97 @ Rockwell City: R63: East View
US 20: RWIS – US 20 MM 97 @ Rockwell City: R63: IA 4 South
US 20: RWIS – US 20 MM 97 @ Rockwell City: R63: Ramp Intersection
US 20: RWIS – US 20 MM 97 @ Rockwell City: R63: US 20 Bridges
US 20: RWIS – US 20 MM 97 @ Rockwell City: R63: US 20 East
US 20: RWIS – US 20 MM 97 @ Rockwell City: R63: US 20 Sensor
US 20: RWIS – US 20 MM 97 @ Rockwell City: R63: West View
US 20: RWIS – US 20 MM 97 @ Rockwell City: R63: West Zoom
US 20: RWIS – US 20 W MM 71.4 @ Early : R73: East View
US 20: RWIS – US 20 W MM 71.4 @ Early : R73: East Zoom View
US 20: RWIS – US 20 W MM 71.4 @ Early : R73: West View
US 20: RWIS – US 20 W MM 71.4 @ Early : R73: West Zoom View
US 20: RWIS – US 20 MM 18 @ Moville: R41: US 20 East – West Bridge Deck
US 20: RWIS – US 20 MM 18 @ Moville: R41: US 20 East – West Lanes
US 20: RWIS – US 20 MM 18 @ Moville: R41: US 20 Moville Intersection
US 20: RWIS – US 20 MM 18 @ Moville: R41: US 20 West View Close
US 20: RWIS – US 20 MM 18 @ Moville: R41: US 20 West View Wide
US 20: SC – US 20 @ Gordon (18)
US 20: SC – US 20 @ Morningside (17)
US 20: SC – US 20 @ Sunnybrook (16)
US 20: SC – US 20 @ Christy (15)
US 20: SC – US 20 @ Lakeport (14)
