Here is the outcome for what this tutorial will teach.
First start off with a box shaped like a road and apply the texture you want. Make sure it is situated right. This is an important part in the process because your texture will remain in that place and you dont want to have a tough time or problems later.
I personally dont like to use the Guide Lines as they are distracting. They are useful sometimes but for this task you wouldnt need them.
Copy that box and paste it and you will have a copy of it. make sure its at the same height as the other. then put it into position.
the corners look aligned but if you zoom in they are not and it will need to be fixed.
Select the newely pasted block.
and press the vertex tool
the corners should turn into white dots.
Now select around the corner we are on. What that should look like is below. After you have a selection around the corner you need to press enter in order for it to select. One that is done it should turn red and with your selection tool you can drag it around.
Now just drag the corner you have selected to the corner of the other block. This doesnt always work but they will align with a grid. So if you find that moving this doesnt put it in the same spot then move it close. Select the other corner and move it to the one you just moved and they will align.
that was a quick lesson on selecting so i wont need to go over it again. We will now work on the other corner. The best way to do this is to move the corners to the intersecting point of those blocks.
This is what you should have in the end.
This was a basic tutorial for making a simple road but also a lesson in the vertex tool. So if you wanted to get creative or needed something to align the vertex tool helps a ton. Play around with your roads. and use references for realism.