Consider this- There is a lake which is 50 meters wide but 500 km long. You want to cross the lake. You are at the middle of one side of the lake. Now to cross you need to travel aproximately 500km if you follow the bank.
Now if your maximum speed is 6 km per hour yo need more than 80 hours.
Now you get a great idea to create a bridge on the lake- Time to cross is reduced to a minute or so. Now what you are doing is instead of walking one dimension following the bank you just bridged the two places using second dimension.
I do not know if it is possible to create a bridge among two places using another dimension or not- but it is alwaws a possibility and you can do it by travelling less than speed of light.