Plane Couette flow (pCf) - the flow between two infinite parallel plates in relative motion - is a topic that has gained a lot of attention among fluid mechanics researchers. In contrast to other wall-bounded flows, the shear stress in pCf is constant across the entire channel. A stage of large-scale laminar-turbulent bands is observed when the flow transitions to turbulence in pCf. Many researchers have extensively studied the characteristics of the transitional regime in smooth pCf over the years. But not many studies have explored the flow transition in rough Couette flows. The present study investigates the transition to turbulence in rough Couette flows using direct numerical simulations (DNS). A computational procedure known as the adiabatic protocol is used in the simulations to achieve the transition. This study considers the flow between a stationary wall and a wall moving at a constant velocity Uw in the flow direction. The stationary wall is mounted with roughness elements of height k and width w. Here, we use roughness elements with a square cross-section (w=h) and vary the pitch λ to study its influence on transition to turbulence. Particular attention is given to uncover the important facets of the transitional regime such as spatio-temporal intermittency, large-scale flow, mean secondary flow, etc.