Route 29 passes under the Trenton @-@ Morrisville Toll Bridge , which carries U.S. Route 1 over the Delaware River . Access to U.S. Route 1 southbound is provided by ramps from Route 29 while access to Route 29 from northbound U.S. Route 1 is provided by South Warren Street . Route 29 passes under the Lower Trenton Bridge and the median narrows again . It interchanges with Market Street , which provides access to Route 33 , and then features an interchange which provides access to the New Jersey State House with a northbound exit and southbound entrance . Route 29 crosses the Assunpink Creek and features an interchange which provides access to South Warren Street with exits in both directions but only a northbound entrance . Route 29 continues to a cloverleaf interchange with Calhoun Street ( County Route 653 ) , which provides access to the Calhoun Street Bridge over the Delaware River . Riverside Avenue exits as a frontage road paralleling the northbound lanes of Route 29 before the road features a northbound exit for Hermitage Avenue . Route 29 comes to a partial interchange with Parkside Avenue , with a northbound exit and southbound entrance , and then features a northbound exit for South Eastfield Avenue .