Project Summary: Rail Investigation - 43 Docket Items - RRD24FR017

Description: Derailment

Mode: Rail

NTSB Number: RRD24FR017

Date of Accident: 10/01/2024

City: Somerville

State/Region: MA

Country: United States

Project Type: Investigation

Docket Information

Creation Date: 10/09/2024

Last Modified: 10/29/2025 1:25 PM

Public Release Date & Time: 09/30/2025 2:00 PM


Docket Table of Contents

Docket Items: 43
#
Title
Pgs
Photo
Type
File
1 FINAL REPORT 8 0 Text/Image View
2 PRELIM REPORT SOMERVILLE, MA 2 0 Text/Image View
3 IIC SUMMARY OF THE ACCIDENT 2 0 Text/Image View
4 TRANSCRIPT UPDATE ERRATA MASSDOT CSO 1 0 Text/Image View
5 TRANSCRIPT UPDATE ERRATA MBTA COO 1 0 Text/Image View
6 TRANSCRIPT OF INTERVIEW MBTA MOTORPERSON 2 34 0 Text/Image View
7 TRANSCRIPT OF INTERVIEW MBTA MOTORPERSON 1 39 0 Text/Image View
8 TRANSCRIPT OF INTERVIEW MASS DPU DIRECTOR RAIL TRANSIT SAFETY 39 0 Text/Image View
9 TRANSCRIPT UPDATE ERRATA MASS DPU DIRECTOR RAIL TRANSIT SAFETY 1 0 Text/Image View
10 TRANSCRIPT OF INTERVIEW MBTA CSO 77 0 Text/Image View
11 TRANSCRIPT UPDATE ERRATA MBTA CSO 3 0 Text/Image View
12 OPERATIONS FACTUAL REPORT 40 0 Text/Image View
13 MOBILE PHONE RECORDS - SPECIALIST'S FACTUAL REPORT 7 0 Text/Image View
14 MBTA OPERATING EMPLOYEE APPLICABLE RULES 28 0 Text/Image View
15 OPERATIONS ALL OBSERVATIONS FOR MOTORPERSON1 AND 2 (PREVIOUS 365 DAYS) 2 0 Text/Image View
16 MBTA STREETCAR MOTORPERSON JOB DESCRIPTION 3 0 Text/Image View
17 OPERATIONS 2023 DPU TRIENNIAL AUDIT OF MBTA-- 117 0 Text/Image View
18 TRACK - GEOMETRY CAR DATA 6-27-24 1 0 Text/Image View
19 TRACK - MAINLINE GEOMETRY 6 0 Text/Image View
20 TRACK - ROW SPEED LIMIT SIGN PLAN 1 0 Text/Image View
21 TRACK - MATERIALS USED 1 1 0 Text/Image View
22 TRACK - TRACK INSPECTION 9-30-24 1 0 Text/Image View
23 TRACK - TURNOUT INSPECTION 8-20-24 2 0 Text/Image View
24 TRACK - TRACK GROUP FACTUAL REPORT 8 0 Text/Image View
25 MECHANICAL GROUP FACTUAL 6 0 Text/Image View
26 MECHANICAL - FLEET INVENTORY 2 0 Text/Image View
27 MECHANICAL - MAINTENANCE RECORDS 12 0 Text/Image View
28 MECHANICAL - EQUIPMENT CONTRACT DATE 1 0 Text/Image View
29 MECHANICAL - NO.7 VEHICLE SPECS 1 0 Text/Image View
30 MECHANICAL - NO.8 VEHICLE SPECS 1 0 Text/Image View
31 SIGNAL FACTUAL 8 0 Text/Image View
32 RED BRIDGE FULL BOOK OF PLANS 140 0 Text/Image View
33 RED BRIDGE CONTROL POINT 1 0 Text/Image View
34 RED BRIDGE INTERLOCKING SIGNAL DOWNLOAD WITH COMMENTS 6 0 Text/Image View
35 TRANSCRIPT OF INTERVIEW MASSDOT CSO 37 0 Text/Image View
36 TRANSCRIPT OF INTERVIEW-MBTA NIGHT SHIFT SUPERVISOR- 40 0 Text/Image View
37 TRANSCRIPT OF INTERVIEW MBTA COO- 69 0 Text/Image View
38 TRACK - SWITCH DRAWING 3 0 Text/Image View
39 OPERATIONS MBTA OPERATING EMPLOYEE SIGNAL PERFORMANCE TESTING PROCEDURE- 2 0 Text/Image View
40 OPERATIONS MBTA INTERSECTION RULES COMPLIANCE TESTING PROCEDURE- 1 0 Text/Image View
41 OPERATIONS MBTA RADAR SPEED TESTING PROCEDURES- 1 0 Text/Image View
42 OPERATIONS MBTA SUPERVISOR CHECK RIDE PROCEDURE- 2 0 Text/Image View
43 24 MONTH SIGNAL INSPECTION RECORD - 5 0 Text/Image View