Connecticut (official cross state routes)

US-44, CT-318, 219, 20, 187, 190, 187

western border to eastern border

CT-169/117

northern border to southern border

CT-32

northern border to southern border

CT-63, 67, 133, 158, 53, 57, 136, US-202

CT-69, 67, 114

CT-72 to southern border

US-1, CT-136, 337, 142, 146, 184, 117

Adventure Cycling Atlantic Coast route (not on map)

Delaware

Draft State Bicycle Touring Map lists many state and local roads plus cross-state bike routes

Florida - NO DESIGNATED CROSS STATE ROUTES

No cycling suitability map

Adventure Cycling Atlantic Coast, and Southern Tier routes (not on map)

Georgia

Numbered state bike routes

Adventure Cycling Atlantic Coast route (not on map)

Idaho - NO DESIGNATED CROSS STATE ROUTES

Route

Description of possible routes based on suitability map

I-90

Eastern to western state border, freeway shoulder

I-86

Eastern to western state border, freeway shoulder

US-95

Northern to southern border, though some segments have narrow shoulders

I-15

Northern to southern border, freeway shoulder

I-84

I-86 to southern border, freeway shoulder

US-30

I-15 to eastern border

US-26

I-15 to eastern border

US-93

I-86 to southern border

State Bicycling map includes only shoulder width data

Adventure Cycling TransAm, Northern Tier, and Lewis & Clark Trail routes (not on map)