PT

Question 1

Route Level Locking
What are the steps in testing whether the points are set or are free to move inside of a route?

Answer 1

1. Centre the points
2. Set the route under test (RUT)
3. Make sure route sets first time
4. Cancel Route
5. Key points in opposing position
6. Try and set route – route won’t set (Not set and
   Not free)
7. Centre points key
8. Set route – route will set and call the points (Not
   set but free)
9. Cancel the route
10. Set the route – route will set, points don’t need to
    move (Set and Free)
11. Cancel Route
12. Key points in position required
13. Set the route – route will set, points won’t move
    (Set and Not free)
14. Cancel Route
15. Repeat for every set of points listed

Question 2

Route Level Locking
How would you ensure there are no rogue points called?

Answer 2

Ensure that only the points that are required are called when the route is requested.

You do this by setting all points to normal, then calling the route. Only points that are required should be moved to reverse.

You then set all points reverse, then call the route. Only points that are required should move.

Question 3

Route Level Locking
How do you test the worst case in a route test?

Answer 3

1. Pull all points in line of route and overlap into the opposing position
2. Set the route - route should set first time - ensure there are no power/timing issues

Question 4

Route Level Locking
What are the steps in testing a set of points in a route?

Answer 4

1. Test if points are set by a route or are free to move
2. Test for rogue points called
3. Test for worst case

Question 5

Route Level Locking
How do you do ticks for points testing in route level locking?

Answer 5

1. On the point control table tick the route in the Set by Routes or Ground frame column
2. On route control table tick and cross tick the points in the Set or Free Box (Once for set and once for free)
3. Write all points Normal in Set or Free box and tick once
4. Write all points Reverse in Set or Free box and tick once
5. Write Worst Case in Set or Free box and tick once

Question 6

Requires Routes & Sectional Route Locking Normal
How do you test sectional route locking normal?

Answer 6

1. Set the RUT
2. Cancel the route
3. Set opposing route (Pull button on any pre-set
   shunts)
4. Try and set RUT – Route won’t set – Can use DJR
   hold if you can see route lights that aren’t part of
   the opposing route*
5. Drop 1st track in opposing route
6. Cancel opposing route
7. Try and set RUT
8. Walk train through opposing route trying to set
   RUT when train is on each track of the opposing
   route – If testing an indirectly opposing route,
   move points to correct lie for RUT when possible
9. RUT should set when train is behind the entrance
   signal – or proved to a stand for overlap locking
10. Cancel DJR hold if used and see entrance button
    for RUT go steady
11. Cancel RUT

Question 7

Requires Routes & Sectional Route Locking Normal
How do you test other routes with the same entrance and exit signal? (Warner/ Call On)

Answer 7

1. Set opposing route
2. Clear Aspect
3. Approach Lock Signal
4. Cancel Opposing Route
5. Whilst Approach Locking is Timing Off Try and set
   RUT (ensure conditions are correct) – Route won’t
   set
6. Free Approach Locking
7. Set RUT – Route should set first time

Question 8

Requires Routes & Sectional Route Locking Normal
How are ticks/markups done for this section?

Answer 8

1. For directly opposing routes Tick and cross tick route (once for Route Normal, once for sectional route locking
   normal)
2. For indirectly opposing routes tick route once (for sectional route locking normal)
3. Tick tracks clear once (sectional route locking released by)
4. For routes with same entrance and exit signal tick route once

Question 9

What is the purpose of testing Opposing routes in the overlap

Answer 9

Ensure that if a route’s overlap is opposing to another route that said route can only set when the other routes
overlap has timed off. This uses the same tests for trailing points in the overlap.