TMS vs ELD vs fleet management software

At a glance

The ELD: a compliance device

An electronic logging device records a driver's record of duty status: off duty, sleeper berth, driving and on duty not driving. Under 49 CFR 395.8(a), a motor carrier subject to the hours-of-service rules must have its drivers record duty status on an ELD, with limited exceptions for drivers who keep paper logs on no more than 8 days in any 30-day period, certain driveaway-towaway operations, and vehicles made before model year 2000.

The ELD rules are in subpart B of part 395. An ELD must appear on FMCSA's registered ELD list (49 CFR 395.22(a)), and it automatically records the date, time, vehicle location, engine hours, vehicle miles and driver, vehicle and carrier identification (49 CFR 395.26). Those records are what an officer reviews at roadside and what an auditor reviews in the office.

What an ELD does not do: it does not know the customer, the rate, the bill of lading or what the driver should be paid. It knows time, place and miles.

Fleet management and telematics

Most ELDs today are part of a larger telematics platform. The same hardware in the truck reports GPS location, speed, fuel use, idle time, engine fault codes and harsh braking or acceleration. Some add dash cameras and trailer tracking. The software around that data is usually called fleet management.

Fleet management answers questions about the vehicle and the driver's behavior: where every truck is right now, which trucks idle too much, who needs coaching. It is excellent at live location, which is why carriers connect it to their TMS rather than asking drivers to report where they are.

The overlap with a TMS is tracking. The difference is context: telematics knows the truck is near a city; the TMS knows that truck is carrying a specific load that is due at a specific dock at a specific time, for a customer who is waiting on an update.

Maintenance software

Maintenance software schedules preventive maintenance by miles, engine hours or dates, tracks work orders and parts, and keeps the inspection and repair history for each unit. Carriers have to keep inspection, repair and maintenance records for vehicles they control, so this history matters at audit time as well as in the shop.

Telematics can feed it odometer readings and fault codes. A TMS may hold basic truck and trailer records and expiry dates, but a dedicated maintenance system goes deeper into parts, labor and service intervals.

The TMS: the record of each load

A transportation management system is where the business happens. It holds the customer's order and rate, the stops and appointments, the assigned driver, truck and trailer, the documents from pickup and delivery, the invoice and the driver's pay for the trip. Dispatchers work from it all day; billing and payroll work from it every week. The what is a TMS guide follows one load through it step by step.

The TMS also handles the jobs that need both operations and money: IFTA fuel tax reports (miles by jurisdiction plus fuel purchased), owner-operator settlements, and revenue and profit reporting by customer, lane or truck.

Accounting software and load boards

Accounting software keeps the general ledger, bank reconciliation, payables and tax reporting. It is good at money and has no idea what a load is. Carriers that invoice from accounting software end up typing load details twice. The usual setup is to invoice and settle in the TMS and sync invoices and payments to accounting.

Load boards are marketplaces where brokers and shippers post available freight and carriers post available trucks. They help you find a load; once you book it, the load still has to be entered, dispatched, delivered, invoiced and paid, which is the TMS's job.

How they connect

The point of having several systems is that each does its own job well. The point of connecting them is that nobody retypes data. A typical flow:

1. Load board or customer to TMS. A booked load arrives as a rate confirmation, an email or an electronic tender and becomes a load in the TMS.
2. TMS to driver. Dispatch sends the trip to the driver's phone or app.
3. ELD and telematics to TMS. Location and status updates flow back during the trip; miles by state flow in for IFTA and for mileage-based pay.
4. Fuel cards to TMS. Fuel purchases arrive for IFTA and driver deductions.
5. Driver to TMS. The signed bill of lading or POD is photographed and attached to the load.
6. TMS to customer or factoring company. The invoice goes out with its documents.
7. TMS to accounting. Invoices, payments and settlements sync to the books.

When one of these links is missing, a person fills the gap by hand, and that is where errors and late invoices come from. The TMS integrations guide goes through which connections to prioritize.

Which one do you need first?

If your drivers must keep records of duty status, the ELD is not optional, so most carriers already have one. The next decision is usually between living with spreadsheets and adopting a TMS. A useful test: count how many times a load's details are typed by hand between the rate confirmation and the paid invoice. If the answer is more than once, a TMS connected to the ELD you already run will save that time on every load. The TMS ROI calculator puts a number on it.