There is a lot of traffic on the road.
a lot of cars congested on a road
If there is traffic you can say that the road is congested.
exists p1 x1 x4.(n_road(x4) & exists x2 x3.((x1 = x2) & on(x2,x4) & of(x2,x3) & n_traffic(x3) & n_lot(x2)))
exists e1 x1 x2 x3 x4.(a_topic(x1) & of(x1,x2) & on(e1,x4) & n_road(x4) & Theme(e1,x3) & v_congest(e1) & (x2 = x3) & n_car(x2) & n_lot(x1))