You from Foshan what place to Maoming what place ah? During the National Day G15 a lot of cars, traffic jams good serious, if you want to not so blocked, there is a route more suitable for traveling slowly driving, spend time absolutely less than G15: West Second Ring ~ Guangming high-speed ~ emerging ~ Yangchun ~ Luoyang high-speed ~ G15, so walk can avoid the location of the traffic jams.
If you are trying to go in the direction of Xinyi, you can take the northern route, Guangkun Expressway
.