# Missouri Route 30

Route 30 is a highway in eastern Missouri, United States. Its eastern terminus is at the Interstate 55/Interstate 44 junction in St. Louis. Its western terminus is at Interstate 44 in St. Clair. In St. Louis, the section between Interstate 44 and Route 366 is part of historic U.S. Route 66 and is marked as such. In the St. Louis area, it is known as Gravois Avenue or Gravois Road. Further south, Gravois Rd. is used to mark the old section of the highway where the newer, divided highway rerouted Highway 30.

## Route description

Route 30 begins as it crosses over Interstate 55 at I-55's interchange with I-44. The four-lane road turns southwest as Gravois Rd and, after about two miles (3.2 km), intersects Route 366. Shortly after the intersection with Route 366, the road becomes a narrow street passing through some older parts of St. Louis. At the city limits of St. Louis, it continues into the suburban area (unincorporated). Shortly before reaching Grantwood Village is the northern terminus with Route 21. About two miles (3.2 km) further west is the intersection with Lindbergh Boulevard (U.S. 50 / U.S. 61 / U.S. 67) and the road becomes a four-lane divided highway. A mile past Lindbergh Boulevard is the junction with I-270, and two miles (3.2 km) southwest of that is an interchange over Route 141.
As the highway continues southwest in the suburban St. Louis area, the road has several traffic lights which gradually diminish as the road approaches Cedar Hill. West of Cedar Hill, the divided highway ends and the road becomes a winding road all the way to its end. A portion of the highway over the Meramec River was re-routed in the early 2000s when a new, wider bridge was built.
West of Lonedell is the beginning of a concurrency with Route 47. The concurrency ends five miles (8.0 km) later inside the city limits of St. Clair. The road briefly joins former U.S. Route 66, turns a corner, and ends at Interstate 44.

### Mass transit

The southern half of MetroBus Route #10 (Lindell-Gravois) follows Gravois Ave from the Civic Center Station at 14th and Spruce, then onto Tucker and Chouteau. From Tucker, the route follows nearly the entirety of Gravois Ave until it reaches the Hampton Loop at Hampton and Gravois.

## Major intersections

| County | Location | mi | km | Destinations | Notes |
| Franklin | St. Clair | 52.718– 52.63 | 84.841– 84.70 | Route WW west / Historic US 66 west I-44 – Rolla, St. Louis | Western terminus of Route 30, eastern terminus of Route WW; west end of concurrency with Historic US 66; exit 239 on I-44; road continues as Route WW/Historic US 66 west |
| Franklin | St. Clair | 52.265 | 84.112 | Route 47 north / Historic US 66 east (Commercial Avenue) | East end of concurrency with Historic US 66; west end of concurrency with Route 47 |
| Franklin | St. Clair | 51.949 | 83.604 | Route PP south (Sycamore Avenue) | Northern terminus of Route PP |
| Franklin | Parkway | 50.901 | 81.917 | Route K south / Parkway Drive | Northern terminus of Route K |
| Franklin | Prairie Township | 46.061 | 74.128 | Route 47 south – Richwoods | East end of concurrency with Route 47 |
| Franklin | Lonedell | 42.859 | 68.975 | Route N north | Southern terminus of Route N |
| Franklin | Lonedell | 42.798 | 68.877 | Route FF south | Northern terminus of Route FF |
| Franklin | Prairie Township | 40.213 | 64.717 | Route HH north | Southern terminus of Route HH |
| Jefferson | Grubville | 38.227 | 61.520 | Route Y south | Northern terminus of Route Y |
| Jefferson | Meramec Township | 31.905 | 51.346 | Route NN north / Route B south – Hillsboro | Southern terminus of Route NN; northern terminus of Route B |
| Jefferson | Cedar Hill | 30.882 | 49.700 | Route BB south – Hillsboro | Northern terminus of Route BB |
| Jefferson | Byrnes Mill | 25.259 | 40.650 | Route W north / Route MM east – Eureka, House Springs | Southern terminus of Route W; northern terminus of Route MM |
| Jefferson | High Ridge | 21.304 | 34.285 | Route PP north | Southern terminus of Route PP |
| St. Louis | Fenton | 14.592– 14.578 | 23.484– 23.461 | Route 141 – Fenton, Valley Park | Interchange |
| St. Louis | Sunset Hills | 11.885– 11.871 | 19.127– 19.105 | I-270 | Exit 3 on I-270 |
| St. Louis | Sunset Hills | 10.932 | 17.593 | US 50 / US 61 / US 67 (Lindbergh Boulevard) | |
| St. Louis | Affton | 7.82 | 12.59 | Route 21 south (Tesson Ferry Road) / Rock Hill Road | Northern terminus of Route 21 |
| St. Louis | Affton | 7.5 | 12.1 | Gravois Loop West | Interchange to frontage roads; eastbound exit and westbound entrance |
| St. Louis | Affton | 7.487 | 12.049 | Gravois Loop East | Interchange to frontage roads; westbound exit and eastbound entrance |
| St. Louis | Affton | 7.284 | 11.722 | Route P north (Mackenzie Road) | Southern terminus of Route P |
| City of St. Louis | City of St. Louis | 3.027 | 4.871 | Frontage roads | Interchange; eastbound exit and westbound entrance |
| City of St. Louis | City of St. Louis | 2.915 | 4.691 | Meramec Street | Partial interchange; intersection with westbound ramp to Meramec St. east; also provides access to Bingham Avenue east |
| City of St. Louis | City of St. Louis | 2.742 | 4.413 | Route 366 / Historic US 66 west (Chippewa Street) | West end of concurrency with Historic US 66; no left turns |
| City of St. Louis | City of St. Louis | 2.06 | 3.32 | Grand Boulevard | |
| City of St. Louis | City of St. Louis | 1.801 | 2.898 | Cherokee Street | |
| City of St. Louis | City of St. Louis | 0.633 | 1.019 | Jefferson Avenue / Sidney Street | No left turns |
| City of St. Louis | City of St. Louis | 0.000 | 0.000 | I-55 south – Memphis | Eastern terminus; exit 207A on I-55 |
| City of St. Louis | City of St. Louis | | | I-44 east / I-55 north Tucker Boulevard (Historic US 66 east) | MoDOT signs this as eastern terminus; exit 290A on I-44 west; east end of concurrency with Historic US 66; road continues north as Tucker Blvd. (Historic US 66 east) |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi Concurrency terminus Incomplete access Route transition ||||||