Surveying safety comes down to managing the hazards that follow the work: traffic on the roads crews work along, heat and weather, trenches and uneven ground, and the plants, animals and buried utilities on the site.
OSHA's construction standards and the FHWA's MUTCD set the rules for traffic control, high-visibility apparel, excavations and ladders, and an employer's program turns them into training, gear and site habits.
What are the main hazards on survey crews?
Crews work where the hazards are: along roads, across fields, on construction sites and over the utilities and terrain the measurement has to reach.
The list is short — traffic, heat and weather, trenches and uneven ground, plants and animals, and buried utilities — and each hazard has rules and habits built around it.
Traffic.
Roadside work puts crews next to live traffic.
The MUTCD's 11th Edition gives surveying its own warning sign — W21-6, named SURVEY CREW — which Section 6H.23 says should be used to warn of surveying crews working in or adjacent to the roadway.
BLS notes that when surveyors work near hazards such as traffic, they generally wear brightly colored or reflective vests to make themselves more visible.
Heat and weather.
CDC/NIOSH's hazard list for outdoor workers includes extreme heat and cold, noise, sun exposure and wildland fire smoke.
Heat also carries a regulatory story that is still moving: OSHA published a proposed Heat Injury and Illness Prevention rule on August 30, 2024, held hearings June 16 through July 2, 2025 and closed the post-hearing comment period October 30, 2025.
States fill part of the gap with their own standards.
OSHA's list of state heat exposure standards names California, Colorado (agricultural), Minnesota (indoor), Oregon and Washington, and California's standard is triggered at 80°F and requires training, water, shade and planning.
That list is OSHA's page as of the research behind this article — other states may also have standards, so check the current page.
Trenches and terrain.
Slopes, ditches, embankments and active construction sites put crews on ground that moves.
Trench work is the sharp edge, and OSHA's standing advice is blunt: never enter a trench unless it has been properly inspected.
Plants and animals.
CDC/NIOSH explicitly lists land surveying among the occupations whose workers are at risk of tickborne diseases, and its outdoor-work list adds mosquito- and tick-borne diseases, venomous snakes, spiders, scorpions, stinging insects and poisonous plants.
NIOSH recommends employers tell outdoor workers to wear light-colored long-sleeved shirts, pants, socks and hats and provide EPA-registered repellents — DEET, picaridin, IR3535, oil of lemon eucalyptus or PMD — against ticks.
Buried utilities.
The hazard underfoot is the one you cannot see.
Before an excavation is opened, OSHA requires the estimated location of underground utilities to be determined and the utility owners contacted, which is why locate marks matter to a crew before anyone breaks ground.
None of these is exotic — they are the ordinary conditions of outdoor field work, which is why the rules in the next section exist.
A new tech can meet any of them in ordinary crew work; the survey technician career guide covers the job itself.
Which OSHA rules apply to surveyors?
The rules this page covers sit in OSHA's construction standards at 29 CFR Part 1926, together with the MUTCD those standards point to for traffic control.
These are construction standards, so they apply to construction work; our research did not establish which OSHA standards cover other survey work.
OSHA writes the safety standards; the FHWA publishes the MUTCD.
Here is the short list a tech should recognize, with what each provision requires.
Hazard instruction.
Under 29 CFR 1926.21(b)(2), a construction employer must instruct each employee in recognizing and avoiding unsafe conditions and the regulations applicable to their work environment.
Harmful plants and animals.
Under 29 CFR 1926.21(b)(4), where harmful plants or animals are present on a job site, exposed employees must be instructed on the potential hazards, how to avoid injury and the first aid procedures to use in the event of injury.
Traffic control devices.
Under 29 CFR 1926.200(g)(2), traffic control devices used to protect construction workers must conform to Part 6 of the MUTCD.
Flagger signaling and flaggers' warning garments fall under 29 CFR 1926.201(a), which also points to MUTCD Part 6.
Which MUTCD edition.
OSHA's incorporation by reference, at 29 CFR 1926.6, still names the 2009 MUTCD including its Revisions 1 and 2, both dated May 2012.
FHWA's current edition is the 11th Edition with Revision 1, dated December 2025.
The practical read: the edition written into OSHA's rule text is not automatically the edition FHWA publishes today, so check which edition a site's traffic control plan is written to.
Excavations and trenches.
Every employee in an excavation must be protected from cave-ins by an adequate protective system, except in excavations entirely in stable rock or less than 5 feet deep where a competent person finds no indication of potential cave-in (29 CFR 1926.652(a)(1)).
Trenches 4 feet or more deep need a stairway, ladder, ramp or other safe means of egress within 25 feet of lateral travel (29 CFR 1926.651(c)(2)).
A competent person inspects the excavation before work starts, as needed throughout the shift and after every rainstorm or other hazard-increasing occurrence (29 CFR 1926.651(k)(1)).
Ladders.
Portable ladders used to reach an upper landing must extend at least 3 feet above it, or be secured at the top with a grasping device (29 CFR 1926.1053(b)(1)).
Ladders used where the employee or the ladder could contact exposed energized electrical equipment must have nonconductive siderails (29 CFR 1926.1053(b)(12)).
Employers must provide ladder and stairway training, as necessary, to each employee using ladders and stairways, through a competent person, covering fall hazards, proper ladder use and placement and maximum load capacities (29 CFR 1926.1060(a)).
Heat.
No final federal heat standard is in effect as of the rulemaking record behind this page.
Absent one, OSHA relies on the General Duty Clause — Section 5(a)(1) of the OSH Act — which the agency says covers heat-related hazards likely to cause death or serious bodily harm.
The state standards listed above are the written heat requirements on OSHA's list as of this research; other states may have adopted rules that list does not reflect, so check your state's current requirements.
Editions move — confirm before you rely on a citation
What safety training will you get?
The floor is the instruction rule itself: on construction work, the OSHA standards above require the employer to instruct each employee in recognizing and avoiding unsafe conditions and the regulations applicable to their work environment.
On a crew, that instruction is built around the site's actual conditions — the roadside setup, the trench on the construction job, the brush line with wasps in it.
Two topics carry their own training rules.
Where harmful plants or animals are present, the required instruction covers the potential hazards, how to avoid injury and the first aid procedures to use in the event of injury.
For employees who use ladders and stairways, the training comes from a competent person and covers fall hazards, proper ladder use and placement and maximum load capacities.
Traffic control has its own line.
MUTCD Section 6D.01 says flaggers should be trained in proper traffic control practices and public contact techniques, and the MUTCD itself does not create a national flagger card — flagger certification is a state matter.
Washington shows what a state rule looks like: under WAC 296-155-305, each flagger must carry a valid Washington traffic control flagger card or a valid card from Oregon, Idaho, Montana or another reciprocal state.
The card expires no more than 3 years after issue, and the training behind it is based on the MUTCD.
Other states' flagger-card rules vary, and the pages our research drew on verified only Washington's — ask what your state and your employer expect before you take a flagging assignment.
The competent person is a title you will hear in training and on site.
The excavation rules put the daily inspections, the checks after every rainstorm and the call on cave-in protection with a competent person — one of the first things to ask about on a new site.
What a given firm adds on top of the rules varies by employer.
Ask in the interview how a company runs each piece — site hazard briefings, flagger assignments, competent-person inspections — and the answers will tell you a lot about how it runs its crews.
What PPE is required?
On roadside work, the requirement a tech meets is high-visibility safety apparel.
MUTCD Section 6C.05 is written as a Standard: all workers within the right-of-way who are within a temporary traffic control zone must wear high-visibility safety apparel meeting the Performance Class 2 or 3 requirements of the ANSI/ISEA 107-2015 publication (or equivalent revisions), day and night.
The class is selected by the employer's designated safety person.
Under the same section, the apparel's background material must be fluorescent orange-red, fluorescent yellow-green or a combination of the two, and the MUTCD says Class 3 apparel should be worn for nighttime flagging.
An ordinary reflective jacket is not automatically enough: inside the right-of-way, the requirement is Performance Class 2 or 3.
Excavation work adds its own vest rule.
Employees in excavation work who are exposed to public vehicular traffic must be provided with, and wear, warning vests or other suitable garments marked with or made of reflectorized or high-visibility material (29 CFR 1926.651(d)).
Who pays is also in the rules.
Employer-required personal protective equipment must generally be provided at no cost to employees, with named exceptions — non-specialty safety-toe boots, and prescription safety glasses where the glasses are allowed to be worn off the job site.
Weather gear sits outside that: items used solely for protection from the weather — winter coats, jackets, gloves, parkas, rubber boots, hats, raincoats, ordinary sunglasses and sunscreen — are not items the employer is required to pay for.
Beyond the apparel the standards name, the rest of the kit comes from the employer's program and the site's own rules.
Read them together before the first setup: the MUTCD answers what the roadside apparel must meet, OSHA's excavation rule answers the vest near traffic, and the employer's program answers everything site-specific.
What to do in an emergency in the field
An emergency in the field runs on the plan the crew settled before leaving the yard, not on improvisation.
The pieces are simple, and a tech should be able to answer each of these without looking.
- Where the crew is: the site address, crossroads or milepost you would give a dispatcher
- How you reach help: who carries the phone or radio, and where coverage drops off
- Where the first-aid kit rides, and who on the crew knows how to use it
- Who back at the office knows where the crew is working today
- What your firm's reporting chain is after an incident, and who can make the call to stop work
Two rules anchor the medical side.
Where harmful plants or animals are present, the instruction OSHA's construction standards require includes the first aid procedures to use in the event of injury — which is where a crew's snakebite, sting and plant-exposure response should come from.
After weather, the excavation rules require the competent person to inspect after every rainstorm or other hazard-increasing occurrence — that inspection is the check to ask about before anyone goes back into a trench.
OSHA's standing advice on trenches is blunt: never enter a trench unless it has been properly inspected.
Injuries get reported up — to the supervisor first, then through the chain your firm uses — so the office knows what happened and the hazard gets attention before the next crew arrives.
Ask your supervisor how the firm handles incidents and stop-work decisions on your first day, and again whenever the site type changes.
The answers are part of knowing your site, the same way the control points are.
Career information, not legal or safety advice. Safety requirements come from OSHA, the FHWA's MUTCD and state rules, and they change — confirm the current requirements with the agencies named and with your employer's safety program.