Then with your references, these streets still couldn't have lines. The double lines represent the median of both lanes of traffic with more than one lane. These roads only hold room for one lane so still it wouldn't be right.
US road system:
White separates lanes of traffic going in the same direction
Yellow separates two different directions of traffic
Single dotted white means crossing lanes is allowed
Single solid white means crossing is not allowed
Half-dotted and half-solid white means only the dotted side can cross lanes
Double solid white is just for visual purposes and is the same as single solid white line. Pretty uncommon.
Double yellow means passing is not allowed
Half-dotted and half-solid yellow means only the dotted side can pass cars and cross the yellow line
Single yellow doesn't exist
Cities with heavy traffic always have double lines in the center.
Residential roads don't always have lines.
The mistake in the OP is that the lines aren't supposed to continue through the intersection.
