Cart or Mob Speeds

I have noticed that when I have two horses on a cart, and I travel far and any mobs come, I simply cannot out run them and often die or I have to jump off my cart and run then wait for very long times to be able to get back to my cart because the mobs stay near the cart and even though I can out run mobs on foot, the minute I get back on the cart, the mobs kill me very easily. This may be discouraging to new players ... or players who love to explore and build but are not interested much in fighting.

So maybe make mobs run slower, or carts with regular wild horses (2 horses) travel faster than mobs? 

Thank you I am grateful for your server still being here as long as you can do it.