The attribute Route1 contains the 'legislative' route
number. Route2 and Route3 may or may not contain the other
route number assigned to that route. Due to inconsistency of
classifications found among USGS 1:100,000 scale quads, some
infrequently occuring classifications were not preserved in
the attributes in the library, but can be retrieved through
related files.
DATA QUALITY ASSESSMENT:
This layer is only as complete as USGS 1:100,000 quad maps,
some of which date back to the mid 1970s. Recent areas of
growth are not included; however, the information the layer
does have is quite detailed and includes even jeep trails.
The attribute coverage is fairly complete with 5 types and
22 classes of roads; however, not all classifications occur
in each county, and classification of secondary roads can be
somewhat inconsistent between 100k quads."
TNODE# : The id number of the node feature that represents
the ending point (To NODE) of the arc.
LPOLY# : The <coverage name># id of the polygon that lies
to the
left of this arc when facing in the direction of the
TNODE.
This is blank if there is no polygon topology.
RPOLY# : The <coverage name># id of the polygon that lies to
the
right of this arc when facing in the direction of the
TNODE.
This is blank if there is no polygon topology.
LENGTH : The length of the arc in coverage units.
ROADSA# : The software-assigned unique integer identification number.
ROADSA-ID : A user-assigned identification number.
DLG-ID: Originally used to hold DLG ID number; some arcs
have been added and changed which has resulted in duplicate
id numbers in this item.
HDLG-ID: Original DLG ID number + (nnn * 1,000,000) where
nnn is the number of the 1:100000 scale quad in
which the arc resides, numbered from 100 in the
northwest of the state to 214 in the southeast.
TYPE: Refers to type of road:
100 Interstate Highway
200 US Highway
300 State Highway
500 Interchange
900 Other
ROUTE1-3: Route numbers of interstates, state routes, or US
routes
ROUTE1: Legislative route number (see User Notes). May
or may not correspond to the common route numbers
seen on highway maps and road signs.
ROUTE2: Other route numbers which may apply to this arc
ROUTE3: Other route numbers which may apply to this arc
Note: The Caltrans project only involved updating the
legislative routes. Consequently, ROUTE2 and ROUTE3 were
not closely checked for accuracy.
CLASS: Refers to the USGS classsification of roads:
Class Value Description
----------- -----------
10 Class 1; Primary Route-undivided
11 Class 1; Primary Route-divided by centerline
12 Class 1; Primary Route-divided, lanes separated
13 Class 1; Primary Route-one way, other than divided
highway
20 Class 2; Secondary Route-undivided
21 Class 2; Secondary Route-divided by centerline
22 Class 2; Secondary Route-divided, lanes separated
23 Class 2; Secondary Route-one way, other than
divided highway
30 Class 3; Thoroughfares, County Roads-mostly paved
31 Class 3; Thoroughfares, County Roads-divided by
centerline
32 Class 3; Thoroughfares, County Roads-divided,
lanes separated
33 Class 3; Thoroughfares, County Roads-one way
40 Class 4; Residential Roads, unimproved, unpaved
roads
43 Class 4; Residential Roads, unimproved, unpaved
roads-one way
49 Class 4; Originally not coded; assumed to be
class 4 based on neighboring arcs
50 Class 5; Other than four-wheel-drive vehicle;
example - hiking trails
51 Class 5; Four wheel drive vehicle
59 Class 5; Originally not coded; assumed to be class 5
based on neighboring arcs
60 Interchanges: They have their own classification
70 Miscellaneous UGSG classifications
80 In service facility or rest area
90 Roads that were newly digitized or roads recoded as
a highway by Caltrans
STATUS: A Caltrans designation:
1 - Constructed; (paved or unpaved)
2 - Adopted; Not yet constructed. Approved for
construction
3 - Proposed; Not yet constructed. Construction is
proposed
UPDINFO: Update information in the format mmyy.nn
Month and year of update (mmyy), followed by an agency code
indicating the updater:
0 - has not been updated; data is from USGS (mmyy)
01 - updated by Caltrans (mmyy.01)
02 - updated by Teale Data Center -- GIS Lab (mmyy.02)
Examples: 1290.02 - Updated in December of 1990 by Caltrans staff
1093.01 - Updated in October of 1993 by Teale staff
HWYRAMP: Flag for highways and ramps:
0 - other than a highway or a ramp
1 - highway or ramp
TAG: Used to flag tile boundaries."