patrolmen. A gang is organized for the work and supplied
with the proper equipment. They go over the roads and patch all worn
places, generally first removing the wearing surface entirely in the
area affected.

The wearing surface mixture is then prepared and tamped or rolled into
place. If the area affected is small, tamping is satisfactory, and
when the area is considerable, rolling is employed. The upkeep of the
side roads may be accomplished by the same gang but is preferably
taken care of by patrolmen, who do not attempt any but minor repairs
to the wearing surface.

MAINTENANCE OF BRICK AND CONCRETE ROADS

On brick and concrete roads, the principal work on the wearing surface
consists in filling the cracks with a suitable bituminous material.
This work is done by patrolmen or by special gangs and generally will
be done once each year. The upkeep of the side roads is cared for by
patrolmen who drag the side roads and cut the weeds as occasion
requires.

INDEX

Administration county; 15
federal; 17
highway; 13
state; 16
township; 13

Aesthetics; 62

Aggregate, fine; 101

Aggregate, coarse; 100

Air resistance; 51

Alignment; 46

Applying bituminous binder; 122

Asphaltic concrete; 128

Asphalt, natural; 117
liquid; 118
petroleum; 117

Assessments, special; 19
zone method; 20

Bedding course, green mortar; 111
sand mortar; 111
sand bedding mortar; 111

Binder for gravel; 75

Bitulithic or warrenite; 128

Bitumen; 118

Bituminous coatings on concrete; 105

Bituminous fillers; 112

Bituminous road materials and their use; 116

Bituminous surfaces; 96, 120

Blade grader; 69

Bonding; 87

Bonds, annuity; 26
serial; 27
sinking fund; 25

Box culverts; 39

Brick roads; 113

Brick, repressed; 107
tests of 108;
vertical fiber; 107
vitrified; 106
wire-cut-lug; 108

Broken stone road surfaces; 89

Cement, asphaltic; 118

Cement concrete roads; 98

Cement grout filler; 112

Characteristics, asphaltic concrete; 129
bituminous macadam; 125
broken stone; 97
concrete; 105
mixed macadam; 128
sand clay; 78

Classes of bituminous materials; 116

Classification according to consistency; 117

Clay and cement concrete pipe; 39

Coal tar; 116

Concrete, asphaltic; 128

Concrete materials; 100

Concrete