Tunneling for Metro projects in urban areas has been transformed in an optimal solution because of its minimal impact in the city infrastructure and therefore challenges about predicted models are relevant nowadays. A better understanding of the ground condition and enough settlement monitoring data to calibrate a reliable numerical modelling, can bring accurate estimates of the effects of tunneling on significant infrastructures of the cities. This article presents a comparative analysis considering two different 3D modelling approaches to evaluate the effects on an existing rail and highway infrastructure due to tunneling of a new Metro line in an urban area. The 3D modelling approaches comprise a simplified 3D model considering an orthogonal crossing, between the tunnel and the railway track, using an extrusion technique of the geometry definition program and the other model, the detailed one, represents the actual angle, not perpendicular, of the crossing between the railway and the tunnel. Furthermore, since a highway overpass is part of the analyzed crossing, deformation of its infrastructure was analyzed as well.