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SAE J2735-Draft-Rev28 [issued: 11-10-08] 
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161 -
This is an SAE Motor Vehicle Council draft document of the DSRC committee, subject to change.
In addition, this item may be used by data structures in other ITS standards.
7.99 Data Element: DE_PedestrianDetect
Use: A date element indicating the (possible) presence of one or more pedestrians or other objects in the
walk area, independent of the technology used to determine this. 
ASN.1 Representation:
PedestrianDetect ::= ENUMERATED {
   none       (0), -- (B00000001) 
   maybe      (1), -- (B00000010)
   one        (2), -- (B00000100) 
   some       (3), -- (B00001000) Indicates more than one
   etc        (4), -- (B00010000) 
                       -- Please suggest 
                       -- suitable terms here
   ...
   } -- one byte
XML Representation:
<xs:simpleType name="PedestrianDetect" >
      <xs:annotation>
         <xs:appinfo>
            none (0) -- (B00000001)
            maybe (1) -- (B00000010)
            one (2) -- (B00000100)
            some (3) -- (B00001000)  Indicates more than one
            etc (4) -- (B00010000)
             -- Please suggest
             -- suitable terms here
         </xs:appinfo>
         <xs:documentation>       
            one byte
         </xs:documentation>
      </xs:annotation>
      <xs:union>
         <xs:simpleType>
            <xs:restriction base="xs:unsignedInt">
               <xs:minInclusive value="0"/>
               <xs:maxInclusive value="4"/>
            </xs:restriction>
         </xs:simpleType>
         <xs:simpleType>
            <xs:restriction base="xs:string">
               <xs:enumeration value="none"/>
               <xs:enumeration value="maybe"/>
               <xs:enumeration value="one"/>
               <xs:enumeration value="some"/>
               <xs:enumeration value="etc"/>
            </xs:restriction>
         </xs:simpleType >
      </xs:union>
</xs:simpleType>
Used By: This entry is used directly by one other data structure in this standard, a DF called
DF_MovementState <ASN> <XML>.   In addition, this item may be used by data structures in other
ITS standards.
7.100 Data Element: DE_PedestrianSignalState
Use: A date element indicating either the current or the next signal state of a particular known pedestrian
lane (depending on usage context).  Used in the SPAT message.  The data element is a 8-bit encoded string,
allowing multiple values to be indicated.