Leave the M6 at Junction 3. Take the A444 towards the city centre. Go across four islands and at the fifth island turn right (signposted Football Ground). Turn left at the next island, follow the road around to the right and at the next island bear to the left. The Sky Blue Tavern and ground are a short distance down this road on the right.
There are excellent train services to Coventry but you face a long walk from the station to the ground I'm afraid, expect about a 30 minute walk.
Catch the No. 17 or No. 27 from the station.
Generally a trouble free ground, unlike its reputation from the 70's and 80's.