I am sorry but there is no way I can identify the grasses from your photos.  As you mention roadsides and along paths, it is highly possible the grass is a mix of fine fescues, probably creeping red and bunch forming.  Check with your locally owned garden center and look for quality seed.  It does not pay to buy cheap grass seed.  The premium mixes will give you the results listed without the addition of several annual grasses and even weed seeds.

That looks like a ground cover rather than a grass.  Trying cutting out a sample (I believe that ground cover will fill that area in) and take it to your locally owned garden center for help in identification.  You might even be able to ID it yourself by comparing it to the plants they have available.  It could be creeping thyme or one of the other ground cover perennials.