If you want the short, direct answer first: a driver may install a mobile phone holder on the dashboard only up to a maximum height of 15 centimeters (about 6 inches) from the base of the dashboard. Anything higher risks obstructing the driver’s line of sight and may be considered a traffic violation.
This rule exists for one simple reason—road safety. A phone mount placed too high can block the windshield view, distract the driver, and increase the risk of accidents. Let’s break this down clearly so you know what’s allowed, what’s not, and how to stay on the right side of the law.
Why Phone Mount Height Matters While Driving
Mobile phones are now part of everyday driving. People use them for navigation, hands-free calls, and emergency communication. Because of this, many traffic authorities allow phone mounts—but only if they are positioned safely.
When a phone is mounted too high:
- It blocks part of the driver’s forward view
- It forces the driver’s eyes away from the road
- It increases distraction during driving
That’s why specific height limits are enforced.
The 15-Centimeter Rule Explained
Under traffic regulations enforced by the Land Transportation Office, a mobile phone holder may be mounted on the dashboard as long as it does not exceed 15 cm from the base of the dashboard.
This means:
- The phone must stay below the driver’s direct line of sight
- It must not block the windshield or road view
- It should be positioned where the driver can glance at it briefly without lifting their head
The base of the dashboard refers to the lower portion closest to the vehicle’s interior, not the windshield glass.
Why 15 cm Is the Limit
The 15-centimeter limit is not random. It’s based on driver eye level and visibility studies. At this height:
- The phone remains within peripheral vision
- The windshield remains unobstructed
- The driver maintains a clear view of traffic signs, pedestrians, and vehicles
Anything higher increases the chance of visual obstruction, especially in traffic or at intersections.
Where Drivers Are Allowed to Mount Their Phones
To stay compliant, drivers should mount their phones:
- On the lower dashboard area
- At a height not exceeding 15 cm
- In a position that does not block air vents or controls
- Where the screen can be seen with a quick glance
Dashboard mounts are preferred over windshield mounts, which are more likely to violate visibility rules.
Where Phone Mounting Is Not Allowed
Drivers should avoid mounting phones:
- On the windshield at eye level
- Above the dashboard line
- Near rearview mirrors
- In areas that block the road view
Even if the phone is used only for navigation, improper placement can still result in a violation.
Does This Rule Apply Even When Using Navigation Apps?
Yes. Using Google Maps, Waze, or any navigation app does not exempt a driver from mount height rules. Navigation is allowed, but placement must still follow safety guidelines.
The law focuses on where the phone is mounted, not just how it’s used.
What Happens If the Phone Is Mounted Too High?
If a phone is installed above the allowed height:
- The driver may be flagged for improper device placement
- It may be considered a visibility obstruction
- Penalties or fines may apply
- In some cases, the driver may be required to remove the mount immediately
Enforcers usually assess this visually, so clear compliance matters.
Tips to Install Your Phone Mount Correctly
To avoid problems:
- Measure roughly 15 cm from the dashboard base before installing
- Sit in the driver’s seat and check if the phone blocks your view
- Make sure the phone does not require head movement to see
- Use hands-free features only
A good rule of thumb: if the phone blocks the road even slightly, it’s too high.
Common Misunderstandings Drivers Have
Let’s clear up a few myths:
- “It’s okay if I’m just using GPS” – Not if it blocks your view
- “Windshield mounts are always allowed” – They’re often restricted
- “As long as I don’t touch the phone, placement doesn’t matter” – Placement still matters
Safety rules focus on visibility, not just distraction.
Why This Rule Protects Everyone
Keeping phones below the 15 cm limit helps:
- Reduce visual distraction
- Prevent missed hazards
- Improve reaction time
- Keep roads safer for all users
Small adjustments in placement can make a big difference.
Final Thoughts
So, what is the maximum height that a driver can install his mobile phone from the base of the dashboard? The answer is clear: no more than 15 centimeters.
Keeping your phone mount within this limit ensures a clear line of sight, reduces distraction, and helps you stay compliant with traffic regulations. When it comes to driving, visibility is safety—and proper phone placement plays a bigger role than most people realize.
