Best route Sacramento to Pismo Beach

Thanks to both of you for your most helpful information. I will be driving a 36 ft. motorhome, so I will have to decide which of the two routes might be better for me. Below is the quote from an RV'er who commented on the bad roads in May of this year, which caused me to ask the best route question:

Quote:

RE: I-5 or CA99?

3 months ago...We just came back from Pismo Beach area. Going and coming using I-5 from Tracy - Manteca (120) down around a 130 miles to Kettleman city turnoff highway 41 out to Paso Robles. Our motorhome took a beating where the concrete bridges or short concrete strips adjoin the asphalt on I-5. I slowed even to 35-45 with no traffic behind me and we still bottomed suspension out. I counted at least 10 different spots on that leg of the trip. So, just a warning, be prepared to loosen some teeth. Next trip, I may try 99 part way starting at Merced north. We have used 99 north from Stockton to Sacramento and then cross over to I-5. It's fairly smooth. I-5 around Stockton is all torn up. road glide 05/13/13 07:36pm