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![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiz9_Jq5_eoUC2rvlY10qsztjxS1s84w-KS4W8PwGUUeMmQWkeIRt7V8Cj77pZ3jeesdcewfop4aMb38SUO1569hUtP2UY12skuZXEjfZ3MNpApKWQS-X3V0s_ug7yCyX4rnsr_nPstamE/s1600/Tower+55+Approach.png)
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhNHoMNZI2XlFtq0Ne_DefQOpwBK9_SxLD52jUazx4DdDpof1UaEI7DONGDmLeqUTN-ThbM3qOka84r58_C107sTed0tDHSb7EZM6lIyaSdSQOguBqg6tjHsGh_FCeVTBfEhhPFGQlrLkc/s1600/Tower+55+Advance+Approach.gif)
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgnNnBJ2JOt5a49Ji-LRNCpnJNOu2Egm93oR5iH9N7fj21eyX7VFxkQJ3YfGeru7oxGPsDZ378VjU_d_nr1DQU_t1DgUV6W4TXGypLIpSEeohVWvonZ-uRNB8GFK2GJd19rTO-LvYccH8k/s1600/Tower+55+Restricting+Top+Head.gif)
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg-EAJRXUYBx7QgFr3TW1t7_tZfsgnaqrmwNg09JhnlU5NJ10tMUDXKJ_raFATFzkgBhEBhUavB4hU1zlyECyiTZqWo8T-op3p9s0HKNGHaCKpdzd9Cs_v7ZFx5fHlnyF19L6G_aLNiAck/s1600/Tower+55+YG.png)
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgF4S-gF8mtFMVlGW2LOq80OUje93O8X_BaU8cpp5m-2Ku_gWfII4XgDVurfAT4DnRROS06L9_oZ3mHTe8JKTVBSQ9GGkL8dJVQ8WXASgniU9rfrYS9pymyL-NVXcqHCN7F1x9BZmwP9f0/s1600/Tower+55+Approach+Diverging.png)
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjMxgptWp8xph3_aWNeghyphenhyphen6bkcVdxe5tsErOTb3Z0J7XW6Clc2j33ke5HaPj-dO1fcYlrDkTW4zxbnJRGuh6EyyL4eBVR9OAxyhaQ8Z7CL6B9nHX9r2NkGFhlHKlzejhmRUcPETf3pd0RE/s1600/Tower+55+Diverging+Clear.png)
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEifEOh0D0pbIo3Nt9PyRJuEN6h3b98F430ybOTMX0l0now8rPXHhnMGGjjvip142mAAk5wIKF07y_T6CcFAcZbs6Ve76ZiBB9IRAvB1P5h_JNYdJSb8mB6nouHf4LqaB3YfnnHFu4gWDmo/s1600/Tower+55+Diverging+Approach.png)
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhiDmxIVt1GPfqYap3Bi8IkaM67V61IJR1-SS-Ggnyc5vAxTtRVlLPbH7rbijT0dFLziE-PG_HzHEnKPaMCRpi9E_f1CFxCCX9f7GExpLiORFXL5h2yhEIZPSe59fazCwFOtWBQSdDJujM/s1600/Tower+55+Diverging+Advance+Approach.gif)
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiRRv24GcSyiuk8W3vcOEowAchPbCJc9JKFkqnYI0GFbsz_38ck7e4BeDlYLI3PHB4u21yiHbkigNVR38QQ2nr2smMSFeT9FKvstFdYsXXBl_GlEEeG1Fb_J0ail7106fJtWEPQGdxqBkI/s1600/Tower+55+Approach+Restricting.gif)
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEizI9-OE1tJqJFJ0M2rjag3He8DEpPKFgA6xiX2QNT_n8WbSA4afYOYgXSlw8mGpED2YHhNwA0YZ-48oVADoltR-6Fe2NJiqRuK8HWScoZR31rNYkx-JKE3Gc0VjSoWDpL2bxzRzc9IoUY/s1600/Tower+55+Restricting+Bottom+Head.gif)
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEitUTOD30Ah5fpVsLGFTninj4MMTd0NDy696YNFSg4avKjgSTeFcbGHqmIIweoHnRxreBwmbKq3WCaPqWj2VpJ2Mq4-8ReKZ-QW1X4L0J1VB2dXlZEFodJTFgBYgWIV9L5-77kT2wx76U4/s1600/Tower+55+Stop.png)
1: CLEAR
2: APPROACH
3: BNSF - APPROACH MEDIUM
3: UNION PACIFIC - ADVANCE APPROACH
4: RESTRICTING (top head for two headed signals.)
5: BNSF - ADVANCE APPROACH
5: UNION PACIFIC - APPROACH CLEAR FIFTY
6: APPROACH DIVERGING (UP only)
7: DIVERGING CLEAR
8: DIVERGING APPROACH
9: BNSF - DIVERGING APPROACH MEDIUM
9: UNION PACIFIC - DIVERGING ADVANCE APPROACH
10: APPROACH RESTRICTING
11: RESTRICTING
12: STOP
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