1. A method for computing railcar switching solutions in a railway switch yard having:
a. a switch for receiving a group of railcars to be switched, the group of railcars being arranged into two or more railcar blocks;
b. a plurality of classification tracks for receiving railcars from the switch, wherein the switch directs railcars from the group of railcars to respective classification tracks;
c. said method comprising:
i. providing in a machine readable storage medium an electronic representation of the status of each classification track, the status capable to acquire at least two conditions namely an opened condition and a closed condition;
1. in the opened condition the classification track is allowed to receive a railcar that belongs to any one of the railcar blocks;
2. in the closed condition the classification track is associated with a particular one of the railcar blocks and is allowed to receive railcars from the particular one of the railcar blocks while being closed to at least another one of the railcar blocks;
ii. computing with a computing device switching solutions for the railcars of the group of railcars, each switching solution being indicative of a classification track in which the railcar is to be directed, said computing using as a factor the status of each classification track and includes:
1. for a railcar that is a first railcar of a given railcar block for which a switching solution is computed, selecting a classification track among the classification tracks having an opened condition;
2. changing the status of the selected classification track in the machine readable storage medium to a closed condition;
iii. outputting data that conveys the switching solutions.
2. A method as defined in claim 1, wherein the railway switch yard is a hump switch yard.
3. A method as defined in claim 2, wherein said computing including determining an available space for receiving cars from the particular one of the railcar blocks in one or more of the classification tracks having an opened condition.
4. A method as defined in claim 3, wherein said computing including using the determined available space as a factor for said selecting.
5. A method as defined in claim 4, wherein said determining in connection with a particular one of the classification tracks having an opened condition includes assessing if the particular one of the classification tracks has enough available space to receive the given block to which the first railcar belongs in its entirety.
6. A method as defined in claim 5, wherein said determining in connection with the particular one of the classification tracks having an opened condition includes assessing the Left Over Room (LOR) that would exist in the eventuality the given block to which the first railcar belongs is directed to the particular one of the classification tracks.
7. A method as defined in claim 6, wherein said computing includes determining the LOR in connection with several ones of the classification tracks having an opened condition and using the determined LORs as a factor for said selecting.
8. A method as defined in claim 2, including assigning the computed switching solution for the first railcar of the given railcar block to every other car of the given rail block, wherein all the railcars of the given railcar block are directed to the same classification track.
9. A method as defined in claim 2, including changing the status of the selected classification track in the machine readable storage medium to an opened condition, subsequent a computation of a switching solution for the last railcar of the given railcar block.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A display sign apparatus comprising:
an elongated support post having a lower end adapted to be buried in earth and an upper end terminating with a connector;
an arcuate arm having an end coupled with said connector and an outwardly extending portion;
a frame connected between said arcuate arm end and said outwardly extending portion; and
a display panel held in said frame against said arcuate arm.
2. The display sign apparatus defined in claim 1 including:
display indicia carried on said display panel.
3. The display sign apparatus defined in claim 2 wherein:
said indicia is magnetically attached to said display panel.
4. The display sign apparatus defined in claim 2 including:
a secondary frame mounted on top of said arcuate arm for insertably receiving a second display panel.
5. The display sign apparatus defined in claim 4 including:
anchor means secured to said lower end of said post for preventing twisting, tilting or leaning of said support post when buried in earth.
6. The display sign apparatus defined in claim 5 including:
illumination means carried on said arcuate arm; and
a power supply mounted on said arcuate arm and connected to said illumination means.
7. The display sign apparatus defined in claim 6 wherein:
said anchor means includes a first flange horizontally carried on said lower end and a second flange carried vertically on said lower end whereby said first flange and said second flange are normal with respect to each other.
8. The display sign apparatus defined in claim 7 wherein:
said illumination means is a panel of solar cells operably coupled to a plurality of LED’s carried on said arcuate arm directed to illuminate said indicia.