Location: Route 15 and St Louis Rd, Belleville As we head out of Belleville, we’re .75 miles from Route 157. Location: Route 15 and Busch Blvd, St Clair Cty In a half mile, we’ll approach Route 157. Location: Route 15 and 88th St, St. Clair Cty Exit for 157.  W to I-255/US-50, E to IL-158 … Continue reading Illinois Route 15, IL-13 to IL-157