Well it is actually only 1 straight long road, just near the golf club, head for simaisma, the first road you encounter where you can spot the stadium, you keep going north (just head towards al khor and simaisma) and keep going straight for a long time. The roads will keep guiding you. When you get near the Krispy Kreme/ Mcdonalds, you are there, but for the beach, you go straight again, then again until you are about to enter Al Khor community road, from the 1 roundabout closest to Al khor community, turn left.